[Icons] Keep semantic red and green on themed glyphs

The one-glyph cutover recolored every icon from a single palette role, so a
disabled deck, a not-ready player and a remove button all lost the red or green
that carried their meaning.

Add Positive and Negative application colors beside the accents, ship
scheme-appropriate defaults for every theme, and resolve them through
ThemeManager. Icons now take an IconTint: a palette role for structural glyphs,
or a semantic role for states and add/remove actions. A disabled semantic icon
falls back to the disabled foreground; on a selected row a semantic tint keeps
its color only while it stays legible on the highlight, and a palette tint keeps
the existing WindowText -> HighlightedText swap.

cockatrice/src/filters/filter_builder.cpp

@@ -30,7 +30,7 @@ FilterBuilder::FilterBuilder(QWidget *parent) : QWidget(parent)
         typeCombo->addItem(CardFilter::typeName(static_cast<CardFilter::Type>(i)), QVariant(i));
     }
 
-    QPushButton *ok = new QPushButton(loadThemedIcon(QStringLiteral("icons/increment")), QString());
+    QPushButton *ok = new QPushButton(loadThemedIcon(QStringLiteral("icons/increment"), AppColor::Positive), QString());
     ok->setObjectName("ok");
     ok->setMaximumSize(20, 20);
 

cockatrice/src/game_graphics/player/player_list_widget.cpp

@@ -68,8 +68,8 @@ PlayerListWidget::PlayerListWidget(TabSupervisor *_tabSupervisor,
                                    QWidget *parent)
     : QTreeWidget(parent), tabSupervisor(_tabSupervisor), client(_client), game(_game), gameStarted(false)
 {
-    readyIcon = loadThemedIcon(QStringLiteral("icons/ready_start"));
-    notReadyIcon = loadThemedIcon(QStringLiteral("icons/not_ready_start"));
+    readyIcon = loadThemedIcon(QStringLiteral("icons/ready_start"), AppColor::Positive);
+    notReadyIcon = loadThemedIcon(QStringLiteral("icons/not_ready_start"), AppColor::Negative);
     concededIcon = loadThemedIcon(QStringLiteral("icons/conceded"));
     playerIcon = loadThemedIcon(QStringLiteral("icons/player"));
     judgeIcon = loadThemedIcon(QStringLiteral("icons/scales"));

cockatrice/src/interface/palette_editor/palette_generator.cpp

@@ -167,6 +167,10 @@ PaletteConfig fromAccent(const QColor &accent, int intensity, const QString &sch
     // the lightened, desaturated companion used for button-gradient highlights.
     cfg.appColors[AppColor::AccentStrong] = hl;
     cfg.appColors[AppColor::AccentSoft] = hsl(accent.lightness() + 60, qRound(accent.hslSaturation() * 70 / 100.0));
+    // Semantic roles stay independent of the accent: a generated palette must
+    // still paint add/ready green and remove/not-ready red.
+    cfg.appColors[AppColor::Positive] = defaultAppColor(AppColor::Positive, dark);
+    cfg.appColors[AppColor::Negative] = defaultAppColor(AppColor::Negative, dark);
 
     // BrightText
     QColor bright;

cockatrice/src/interface/palette_editor/palette_grid_widget.cpp

@@ -6,6 +6,7 @@
 
 #include <QApplication>
 #include <QColor>
+#include <QCoreApplication>
 #include <QEvent>
 #include <QFont>
 #include <QFrame>
@@ -62,6 +63,10 @@ static const QMap<QPalette::ColorRole, const char *> ROLE_DESCRIPTIONS = {
 static const QMap<AppColor::Role, const char *> APP_ROLE_DESCRIPTIONS = {
     {AppColor::AccentStrong, QT_TR_NOOP("Vivid primary accent (e.g. home-tab button gradient start)")},
     {AppColor::AccentSoft, QT_TR_NOOP("Lightened, desaturated accent (e.g. home-tab button gradient end)")},
+    {AppColor::Positive,
+     QT_TRANSLATE_NOOP("PaletteGridWidget", "Positive state and additive actions (ready, add, increment)")},
+    {AppColor::Negative,
+     QT_TRANSLATE_NOOP("PaletteGridWidget", "Negative state and removal actions (not ready, remove, decrement)")},
 };
 
 PaletteGridWidget::PaletteGridWidget(QWidget *parent) : QWidget(parent)
@@ -179,7 +184,7 @@ void PaletteGridWidget::buildGrid(QWidget *host)
         }
 
         auto *label = new QLabel(QString(appEnum.valueToKey(role)), host);
-        label->setToolTip(APP_ROLE_DESCRIPTIONS.value(role, {}));
+        label->setToolTip(QCoreApplication::translate("PaletteGridWidget", APP_ROLE_DESCRIPTIONS.value(role, {})));
         label->setContentsMargins(4, 2, 8, 2);
         grid->addWidget(label, row, 0);
 

cockatrice/src/interface/theme_config.cpp

@@ -9,6 +9,7 @@
 #include <QList>
 #include <QMetaEnum>
 #include <QPair>
+#include <QStringLiteral>
 #include <QTextStream>
 #include <qnamespace.h>
 #include <utility>
@@ -451,3 +452,19 @@ FontConfig FontConfig::fromThemeDir(const QString &themeDirPath)
 
     return fromFile(QDir(themeDirPath).absoluteFilePath(fileName()));
 }
+
+QColor defaultAppColor(AppColor::Role role, bool dark)
+{
+    switch (role) {
+        case AppColor::AccentStrong:
+        case AppColor::AccentSoft:
+            // Derived from the palette highlight by ThemeManager::appColor().
+            return {};
+        case AppColor::Positive:
+            return QColor(dark ? QStringLiteral("#6dd58c") : QStringLiteral("#1b7f3b"));
+        case AppColor::Negative:
+            return QColor(dark ? QStringLiteral("#ff8a80") : QStringLiteral("#b3261e"));
+    }
+
+    return {};
+}

cockatrice/src/interface/theme_config.h

@@ -20,6 +20,8 @@ enum Role
 {
     AccentStrong,
     AccentSoft,
+    Positive,
+    Negative,
 };
 Q_ENUM_NS(Role)
 } // namespace AppColor
@@ -41,6 +43,16 @@ enum Role
 Q_ENUM_NS(Role)
 } // namespace AppFont
 
+/**
+ * @brief Fallback for an application color role when the active theme does not
+ *        define one.
+ *
+ * Accent roles return an invalid QColor because ThemeManager derives them from
+ * the palette highlight. Semantic roles return an opaque, scheme-appropriate
+ * default so a theme written before the role existed still renders it sensibly.
+ */
+QColor defaultAppColor(AppColor::Role role, bool dark);
+
 struct ThemeConfig
 {
     QString colorScheme;

cockatrice/src/interface/theme_icon.cpp

@@ -23,19 +23,74 @@
 #include <QStyle>
 #include <QSvgRenderer>
 #include <QtGlobal>
+#include <cmath>
 #include <utility>
 
 namespace
 {
 /**
- * @brief Palette color that replaces `currentColor`, following the icon mode.
+ * @brief WCAG relative luminance, used to test a tint against a background.
  */
-QByteArray sentinelColor(QIcon::Mode mode, QPalette::ColorRole role)
+double relativeLuminance(const QColor &color)
 {
+    const auto linear = [](double channel) {
+        channel /= 255.0;
+        return channel <= 0.03928 ? channel / 12.92 : std::pow((channel + 0.055) / 1.055, 2.4);
+    };
+    return 0.2126 * linear(color.red()) + 0.7152 * linear(color.green()) + 0.0722 * linear(color.blue());
+}
+
+double contrastRatio(const QColor &first, const QColor &second)
+{
+    const double a = relativeLuminance(first);
+    const double b = relativeLuminance(second);
+    return (qMax(a, b) + 0.05) / (qMin(a, b) + 0.05);
+}
+} // namespace
+
+IconTint::IconTint(QPalette::ColorRole role) : paletteRole(role)
+{
+}
+
+IconTint::IconTint(AppColor::Role role) : source(Source::AppColor), appRole(role)
+{
+}
+
+QColor IconTint::resolve(QIcon::Mode mode) const
+{
+    if (source == Source::AppColor) {
+        // A disabled control must not keep signalling its semantic color.
+        if (mode == QIcon::Disabled) {
+            return qApp->palette().color(QPalette::Disabled, QPalette::WindowText);
+        }
+        const QColor color = themeManager->appColor(appRole);
+        if (mode != QIcon::Selected) {
+            return color;
+        }
+        // Selected rows paint their icon on the highlight colour. Keep the
+        // semantic tint when it stays legible there; otherwise the glyph would
+        // vanish into the selection.
+        constexpr double MIN_SELECTED_CONTRAST = 3.0;
+        const QColor highlight = qApp->palette().color(QPalette::Active, QPalette::Highlight);
+        return contrastRatio(color, highlight) >= MIN_SELECTED_CONTRAST
+                   ? color
+                   : qApp->palette().color(QPalette::Active, QPalette::HighlightedText);
+    }
+
     const QPalette::ColorGroup group = mode == QIcon::Disabled ? QPalette::Disabled : QPalette::Active;
     const QPalette::ColorRole effective =
-        mode == QIcon::Selected && role == QPalette::WindowText ? QPalette::HighlightedText : role;
-    return qApp->palette().color(group, effective).name(QColor::HexRgb).toLatin1();
+        mode == QIcon::Selected && paletteRole == QPalette::WindowText ? QPalette::HighlightedText : paletteRole;
+    return qApp->palette().color(group, effective);
+}
+
+namespace
+{
+/**
+ * @brief Color that replaces `currentColor`, following the icon mode.
+ */
+QByteArray sentinelColor(QIcon::Mode mode, const IconTint &tint)
+{
+    return tint.resolve(mode).name(QColor::HexRgb).toLatin1();
 }
 
 /**
@@ -106,7 +161,7 @@ QString cacheKey(const QString &path, const QByteArray &variant, const QSize &si
 class ThemeSvgIconEngine final : public QObject, public QIconEngine
 {
 public:
-    ThemeSvgIconEngine(QString _prefix, QPalette::ColorRole _role) : prefix(std::move(_prefix)), role(_role)
+    ThemeSvgIconEngine(QString _prefix, IconTint _tint) : prefix(std::move(_prefix)), tint(_tint)
     {
         if (themeManager) {
             // A theme switch changes the resolved asset (scheme-qualified
@@ -120,7 +175,7 @@ public:
 
     QIconEngine *clone() const override
     {
-        return new ThemeSvgIconEngine(prefix, role);
+        return new ThemeSvgIconEngine(prefix, tint);
     }
 
     void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State) override
@@ -238,7 +293,7 @@ private:
         // with its own colors varies by mode (Disabled is generated). A color
         // variant is never a bare digit, so the two key spaces cannot collide.
         const QByteArray variant =
-            resolvedHasSentinel ? sentinelColor(mode, role) : QByteArray::number(static_cast<int>(mode));
+            resolvedHasSentinel ? sentinelColor(mode, tint) : QByteArray::number(static_cast<int>(mode));
         const QString key = cacheKey(resolvedPath, variant, pixelSize, devicePixelRatio);
         const auto cached = cache.constFind(key);
         if (cached != cache.constEnd()) {
@@ -266,7 +321,7 @@ private:
     }
 
     QString prefix;
-    QPalette::ColorRole role;
+    IconTint tint;
     mutable QHash<QString, QPixmap> cache;
     mutable QString resolvedPath;
     mutable QString resolvedThemePath;
@@ -279,12 +334,12 @@ private:
 };
 } // namespace
 
-QIcon loadThemedIcon(QStringView prefix, QPalette::ColorRole role)
+QIcon loadThemedIcon(QStringView prefix, IconTint tint)
 {
-    return QIcon(new ThemeSvgIconEngine(prefix.toString(), role));
+    return QIcon(new ThemeSvgIconEngine(prefix.toString(), tint));
 }
 
-QPixmap loadSentinelSvgPixmap(const QString &resolvedPath, QPalette::ColorRole role, const QSize &size)
+QPixmap loadSentinelSvgPixmap(const QString &resolvedPath, IconTint tint, const QSize &size)
 {
     if (!resolvedPath.endsWith(QStringLiteral(".svg"), Qt::CaseInsensitive)) {
         return {};
@@ -295,6 +350,6 @@ QPixmap loadSentinelSvgPixmap(const QString &resolvedPath, QPalette::ColorRole r
         return {};
     }
 
-    const QByteArray color = qApp->palette().color(role).name(QColor::HexRgb).toLatin1();
+    const QByteArray color = tint.resolve(QIcon::Normal).name(QColor::HexRgb).toLatin1();
     return renderSvg(resolveSvgColorSentinel(svg, color), size, 1.0);
 }

cockatrice/src/interface/theme_icon.h

@@ -6,6 +6,9 @@
 #ifndef THEME_ICON_H
 #define THEME_ICON_H
 
+#include "theme_config.h"
+
+#include <QColor>
 #include <QIcon>
 #include <QPalette>
 #include <QPixmap>
@@ -13,6 +16,41 @@
 #include <QString>
 #include <QStringView>
 
+/**
+ * @brief Selects the color that replaces the `currentColor` sentinel.
+ *
+ * A palette role follows Qt's structural palette. An application color carries
+ * meaning that QPalette cannot express, such as positive and negative states.
+ * Callers pick the role by intent; the theme owns the concrete value.
+ */
+class IconTint
+{
+public:
+    IconTint() = default;
+    IconTint(QPalette::ColorRole role); // implicit: existing palette-role callers
+    IconTint(AppColor::Role role);      // implicit: semantic callers
+
+    /**
+     * @brief Resolves the concrete color for an icon mode.
+     *
+     * Disabled application colors resolve to the disabled foreground so an
+     * unavailable control does not keep signalling its semantic color. Selected
+     * palette colors keep the existing WindowText -> HighlightedText swap.
+     */
+    QColor resolve(QIcon::Mode mode) const;
+
+private:
+    enum class Source
+    {
+        Palette,
+        AppColor,
+    };
+
+    Source source = Source::Palette;
+    QPalette::ColorRole paletteRole = QPalette::WindowText;
+    AppColor::Role appRole = AppColor::AccentStrong;
+};
+
 /**
  * @brief Builds a palette-aware icon from a `theme:` asset.
  *
@@ -24,11 +62,11 @@
  *
  * @param prefix Asset prefix relative to the `theme:` search path, with no file
  *               extension (for example `icons/search`), matching themePixmap().
- * @param role Palette role whose color replaces the sentinel. Selected glyphs
- *             use HighlightedText unless a role other than WindowText is given.
+ * @param tint Color that replaces the sentinel: a palette role or a semantic
+ *             application color. Defaults to WindowText.
  * @return An icon that follows the application palette.
  */
-QIcon loadThemedIcon(QStringView prefix, QPalette::ColorRole role = QPalette::WindowText);
+QIcon loadThemedIcon(QStringView prefix, IconTint tint = {});
 
 /**
  * @brief Renders a resolved theme SVG when it carries the `currentColor` sentinel.
@@ -38,13 +76,12 @@ QIcon loadThemedIcon(QStringView prefix, QPalette::ColorRole role = QPalette::Wi
  *
  * @param resolvedPath Asset path relative to the `theme:` search path, as
  *                     returned by ThemeManager::assetPath (includes extension).
- * @param role Palette role whose color replaces the sentinel.
+ * @param tint Color that replaces the sentinel: a palette role or a semantic
+ *             application color. Defaults to WindowText.
  * @param size Pixel size to render at; an empty size uses the SVG's intrinsic size.
  * @return The recolored pixmap, or a null pixmap when the asset is not a
  *         sentinel-carrying SVG.
  */
-QPixmap loadSentinelSvgPixmap(const QString &resolvedPath,
-                              QPalette::ColorRole role = QPalette::WindowText,
-                              const QSize &size = {});
+QPixmap loadSentinelSvgPixmap(const QString &resolvedPath, IconTint tint = {}, const QSize &size = {});
 
 #endif // THEME_ICON_H

cockatrice/src/interface/theme_manager.cpp

@@ -639,14 +639,23 @@ QColor ThemeManager::appColor(AppColor::Role role) const
     // unconditionally keeps every Qt version rendering identically.
     const QColor accent = qApp->palette().color(QPalette::Active, QPalette::Highlight);
 
-    if (role == AppColor::AccentSoft) {
-        constexpr int SOFT_SATURATION_PERCENT = 70;
-        constexpr int SOFT_LIGHTNESS_OFFSET = 60;
+    switch (role) {
+        case AppColor::AccentStrong:
+            return accent;
+        case AppColor::AccentSoft: {
+            constexpr int SOFT_SATURATION_PERCENT = 70;
+            constexpr int SOFT_LIGHTNESS_OFFSET = 60;
 
-        // Light end of the gradient: same hue, softened and lightened
-        return QColor::fromHsl(qMax(0, accent.hslHue()),
-                               qBound(0, qRound(accent.hslSaturation() * SOFT_SATURATION_PERCENT / 100.0), 255),
-                               qBound(0, accent.lightness() + SOFT_LIGHTNESS_OFFSET, 255));
+            // Light end of the gradient: same hue, softened and lightened
+            return QColor::fromHsl(qMax(0, accent.hslHue()),
+                                   qBound(0, qRound(accent.hslSaturation() * SOFT_SATURATION_PERCENT / 100.0), 255),
+                                   qBound(0, accent.lightness() + SOFT_LIGHTNESS_OFFSET, 255));
+        }
+        case AppColor::Positive:
+        case AppColor::Negative:
+            // Semantic colors are independent of the accent: a missing role must
+            // not silently paint "remove" in the theme's highlight color.
+            return defaultAppColor(role, isDarkModeActive());
     }
 
     return accent;

cockatrice/src/interface/theme_manager.h

@@ -147,7 +147,8 @@ public:
     void previewFonts(const FontConfig &cfg);
 
     // Resolves an application color role: the theme's stored [AppColors] value
-    // when present, otherwise a palette-accent-derived fallback.
+    // when present, otherwise a palette-accent-derived fallback for accents and
+    // a scheme-appropriate semantic default for positive / negative.
     QColor appColor(AppColor::Role role) const;
     /** @brief Resolves an application font role: the theme's stored [Fonts]
      *         value when present, otherwise the application font. Roles that

cockatrice/src/interface/widgets/deck_editor/deck_editor_database_display_widget.cpp

@@ -83,12 +83,14 @@ DeckEditorDatabaseDisplayWidget::DeckEditorDatabaseDisplayWidget(QWidget *parent
             &DeckEditorDatabaseDisplayWidget::onRelatedCardClicked);
 
     aAddCard = new QAction(QString(), this);
-    aAddCard->setIcon(loadThemedIcon(QStringLiteral("icons/arrow_right")));
+    aAddCard->setIcon(loadThemedIcon(QStringLiteral("icons/arrow_right"), AppColor::Positive));
     connect(aAddCard, &QAction::triggered, this, &DeckEditorDatabaseDisplayWidget::actAddCardToMainDeck);
     auto *tbAddCard = new QToolButton(this);
     tbAddCard->setDefaultAction(aAddCard);
 
     aAddCardToSideboard = new QAction(QString(), this);
+    // Sideboard is a destination, not a positive state: its distinct glyph
+    // keeps the target legible without competing with the green main-deck add.
     aAddCardToSideboard->setIcon(loadThemedIcon(QStringLiteral("icons/arrow_right_sideboard")));
     connect(aAddCardToSideboard, &QAction::triggered, this, &DeckEditorDatabaseDisplayWidget::actAddCardToSideboard);
     auto *tbAddCardToSideboard = new QToolButton(this);

cockatrice/src/interface/widgets/deck_editor/deck_editor_deck_dock_widget.cpp

@@ -248,19 +248,19 @@ void DeckEditorDeckDockWidget::createDeckDock()
             &DeckEditorDeckDockWidget::applyActiveGroupCriteria);
 
     aIncrement = new QAction(QString(), this);
-    aIncrement->setIcon(loadThemedIcon(QStringLiteral("icons/increment")));
+    aIncrement->setIcon(loadThemedIcon(QStringLiteral("icons/increment"), AppColor::Positive));
     connect(aIncrement, &QAction::triggered, this, &DeckEditorDeckDockWidget::actIncrementSelection);
     auto *tbIncrement = new QToolButton(this);
     tbIncrement->setDefaultAction(aIncrement);
 
     aDecrement = new QAction(QString(), this);
-    aDecrement->setIcon(loadThemedIcon(QStringLiteral("icons/decrement")));
+    aDecrement->setIcon(loadThemedIcon(QStringLiteral("icons/decrement"), AppColor::Negative));
     connect(aDecrement, &QAction::triggered, this, &DeckEditorDeckDockWidget::actDecrementSelection);
     auto *tbDecrement = new QToolButton(this);
     tbDecrement->setDefaultAction(aDecrement);
 
     aRemoveCard = new QAction(QString(), this);
-    aRemoveCard->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    aRemoveCard->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     connect(aRemoveCard, &QAction::triggered, this, &DeckEditorDeckDockWidget::actRemoveCard);
     auto *tbRemoveCard = new QToolButton(this);
     tbRemoveCard->setDefaultAction(aRemoveCard);

cockatrice/src/interface/widgets/deck_editor/deck_editor_filter_dock_widget.cpp

@@ -64,7 +64,7 @@ void DeckEditorFilterDockWidget::createFiltersDock()
     connect(filterBuilder, &FilterBuilder::add, filterModel, &FilterTreeModel::addFilter);
 
     aClearFilterOne = new QAction(QString(), this);
-    aClearFilterOne->setIcon(loadThemedIcon(QStringLiteral("icons/decrement")));
+    aClearFilterOne->setIcon(loadThemedIcon(QStringLiteral("icons/decrement"), AppColor::Negative));
     connect(aClearFilterOne, &QAction::triggered, this, &DeckEditorFilterDockWidget::actClearFilterOne);
 
     aClearFilterAll = new QAction(QString(), this);

cockatrice/src/interface/widgets/dialogs/dlg_connect.cpp

@@ -38,7 +38,7 @@ DlgConnect::DlgConnect(QWidget *parent) : QDialog(parent)
     previousHosts = new QComboBox(this);
 
     btnDeleteServer = new QPushButton(this);
-    btnDeleteServer->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    btnDeleteServer->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     btnDeleteServer->setToolTip(tr("Delete the currently selected saved server"));
     btnDeleteServer->setFixedWidth(30);
 

cockatrice/src/interface/widgets/dialogs/dlg_edit_tokens.cpp

@@ -108,10 +108,10 @@ DlgEditTokens::DlgEditTokens(QWidget *parent) : QDialog(parent), currentCard(nul
             &DlgEditTokens::tokenSelectionChanged);
 
     QAction *aAddToken = new QAction(tr("Add token"), this);
-    aAddToken->setIcon(loadThemedIcon(QStringLiteral("icons/increment")));
+    aAddToken->setIcon(loadThemedIcon(QStringLiteral("icons/increment"), AppColor::Positive));
     connect(aAddToken, &QAction::triggered, this, &DlgEditTokens::actAddToken);
     QAction *aRemoveToken = new QAction(tr("Remove token"), this);
-    aRemoveToken->setIcon(loadThemedIcon(QStringLiteral("icons/decrement")));
+    aRemoveToken->setIcon(loadThemedIcon(QStringLiteral("icons/decrement"), AppColor::Negative));
     connect(aRemoveToken, &QAction::triggered, this, &DlgEditTokens::actRemoveToken);
 
     auto *databaseToolBar = new QToolBar;

cockatrice/src/interface/widgets/dialogs/dlg_register.cpp

@@ -34,7 +34,7 @@ DlgRegister::DlgRegister(QWidget *parent) : QDialog(parent)
     previousHosts = new QComboBox(this);
 
     btnDeleteServer = new QPushButton(this);
-    btnDeleteServer->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    btnDeleteServer->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     btnDeleteServer->setToolTip(tr("Delete the currently selected saved server"));
     btnDeleteServer->setFixedWidth(30);
 

cockatrice/src/interface/widgets/settings_page/deck_editor_settings_page.cpp

@@ -80,7 +80,7 @@ DeckEditorSettingsPage::DeckEditorSettingsPage()
     }
 
     aAdd = new QAction(this);
-    aAdd->setIcon(loadThemedIcon(QStringLiteral("icons/increment")));
+    aAdd->setIcon(loadThemedIcon(QStringLiteral("icons/increment"), AppColor::Positive));
     connect(aAdd, &QAction::triggered, this, &DeckEditorSettingsPage::actAddURL);
 
     aEdit = new QAction(this);
@@ -88,7 +88,7 @@ DeckEditorSettingsPage::DeckEditorSettingsPage()
     connect(aEdit, &QAction::triggered, this, &DeckEditorSettingsPage::actEditURL);
 
     aRemove = new QAction(this);
-    aRemove->setIcon(loadThemedIcon(QStringLiteral("icons/decrement")));
+    aRemove->setIcon(loadThemedIcon(QStringLiteral("icons/decrement"), AppColor::Negative));
     connect(aRemove, &QAction::triggered, this, &DeckEditorSettingsPage::actRemoveURL);
 
     aRateLimit = new QAction(this);

cockatrice/src/interface/widgets/settings_page/messages_settings_page.cpp

@@ -146,7 +146,7 @@ MessagesSettingsPage::MessagesSettingsPage()
     }
 
     aAdd = new QAction(this);
-    aAdd->setIcon(loadThemedIcon(QStringLiteral("icons/increment")));
+    aAdd->setIcon(loadThemedIcon(QStringLiteral("icons/increment"), AppColor::Positive));
     connect(aAdd, &QAction::triggered, this, &MessagesSettingsPage::actAdd);
 
     aEdit = new QAction(this);
@@ -154,7 +154,7 @@ MessagesSettingsPage::MessagesSettingsPage()
     connect(aEdit, &QAction::triggered, this, &MessagesSettingsPage::actEdit);
 
     aRemove = new QAction(this);
-    aRemove->setIcon(loadThemedIcon(QStringLiteral("icons/decrement")));
+    aRemove->setIcon(loadThemedIcon(QStringLiteral("icons/decrement"), AppColor::Negative));
     connect(aRemove, &QAction::triggered, this, &MessagesSettingsPage::actRemove);
 
     auto *messageToolBar = new QToolBar;

cockatrice/src/interface/widgets/tabs/tab_deck_storage.cpp

@@ -199,7 +199,7 @@ TabDeckStorage::TabDeckStorage(TabSupervisor *_tabSupervisor,
     aNewLocalFolder->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogNewFolder));
     connect(aNewLocalFolder, &QAction::triggered, this, &TabDeckStorage::actNewLocalFolder);
     aDeleteLocalDeck = new QAction(this);
-    aDeleteLocalDeck->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    aDeleteLocalDeck->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     connect(aDeleteLocalDeck, &QAction::triggered, this, &TabDeckStorage::actDeleteLocalDeck);
 
     aOpenDecksFolder = new QAction(this);
@@ -217,7 +217,7 @@ TabDeckStorage::TabDeckStorage(TabSupervisor *_tabSupervisor,
     aNewFolder->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogNewFolder));
     connect(aNewFolder, &QAction::triggered, this, &TabDeckStorage::actNewFolder);
     aDeleteRemoteDeck = new QAction(this);
-    aDeleteRemoteDeck->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    aDeleteRemoteDeck->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     connect(aDeleteRemoteDeck, &QAction::triggered, this, &TabDeckStorage::actDeleteRemoteDeck);
 
     aShareDecks = new QAction(this);

cockatrice/src/interface/widgets/tabs/tab_replays.cpp

@@ -155,7 +155,7 @@ QGroupBox *TabReplays::createLeftLayout()
     aNewLocalFolder->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogNewFolder));
     connect(aNewLocalFolder, &QAction::triggered, this, &TabReplays::actNewLocalFolder);
     aDeleteLocalReplay = new QAction(this);
-    aDeleteLocalReplay->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    aDeleteLocalReplay->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     connect(aDeleteLocalReplay, &QAction::triggered, this, &TabReplays::actDeleteLocalReplay);
 
     aOpenReplaysFolder = new QAction(this);
@@ -217,7 +217,7 @@ QGroupBox *TabReplays::createRightLayout()
     aKeep->setIcon(loadThemedIcon(QStringLiteral("icons/lock")));
     connect(aKeep, &QAction::triggered, this, &TabReplays::actKeepRemoteReplay);
     aDeleteRemoteReplay = new QAction(this);
-    aDeleteRemoteReplay->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row")));
+    aDeleteRemoteReplay->setIcon(loadThemedIcon(QStringLiteral("icons/remove_row"), AppColor::Negative));
     connect(aDeleteRemoteReplay, &QAction::triggered, this, &TabReplays::actDeleteRemoteReplay);
     aGetReplayCode = new QAction(this);
     aGetReplayCode->setIcon(loadThemedIcon(QStringLiteral("icons/share")));

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_widget.cpp

@@ -156,7 +156,7 @@ VisualDatabaseDisplayWidget::VisualDatabaseDisplayWidget(QWidget *parent,
 
     clearFilterWidget = new QToolButton();
     clearFilterWidget->setFixedSize(32, 32);
-    clearFilterWidget->setIcon(loadThemedIcon(QStringLiteral("icons/delete")));
+    clearFilterWidget->setIcon(loadThemedIcon(QStringLiteral("icons/delete"), AppColor::Negative));
     connect(clearFilterWidget, &QToolButton::clicked, this, [this] {
         filterModel->blockSignals(true);
         filterModel->filterTree()->blockSignals(true);

cockatrice/themes/Fabric/palette-default-dark.toml

@@ -71,4 +71,6 @@ Accent               = #4a82e6
 [AppColors]
 AccentStrong         = #3a6fd6
 AccentSoft           = #8fb8f2
+Positive             = #6dd58c
+Negative             = #ff8a80
 

cockatrice/themes/Fabric/palette-default-light.toml

@@ -71,4 +71,6 @@ Accent               = #2f6fd6
 [AppColors]
 AccentStrong         = #3a6fd6
 AccentSoft           = #8fb8f2
+Positive             = #1b7f3b
+Negative             = #b3261e
 

cockatrice/themes/Fusion/palette-default-dark.toml

@@ -71,3 +71,5 @@ Accent               = #ff1e1e1e
 [AppColors]
 AccentStrong        = #ff139740
 AccentSoft          = #ffc9fd62
+Positive            = #6dd58c
+Negative            = #ff8a80

cockatrice/themes/Fusion/palette-default-light.toml

@@ -71,3 +71,5 @@ Accent               = #fff0f0f0
 [AppColors]
 AccentStrong        = #ff139740
 AccentSoft          = #ffc9fd62
+Positive            = #1b7f3b
+Negative            = #b3261e

cockatrice/themes/Leather/palette-default-dark.toml

@@ -71,4 +71,6 @@ Accent               = #c9995a
 [AppColors]
 AccentStrong         = #b7823b
 AccentSoft           = #e4c58f
+Positive             = #6dd58c
+Negative             = #ff8a80
 

cockatrice/themes/Leather/palette-default-light.toml

@@ -71,4 +71,6 @@ Accent               = #a5712f
 [AppColors]
 AccentStrong         = #b7823b
 AccentSoft           = #e4c58f
+Positive             = #1b7f3b
+Negative             = #b3261e
 

cockatrice/themes/Plasma/palette-default-dark.toml

@@ -71,4 +71,6 @@ Accent               = #6a4df0
 [AppColors]
 AccentStrong         = #5b3ee0
 AccentSoft           = #a28bf7
+Positive             = #6dd58c
+Negative             = #ff8a80
 

cockatrice/themes/Plasma/palette-default-light.toml

@@ -71,4 +71,6 @@ Accent               = #5a3ee2
 [AppColors]
 AccentStrong         = #5b3ee0
 AccentSoft           = #a28bf7
+Positive             = #1b7f3b
+Negative             = #b3261e
 

cockatrice/themes/System/palette-default-dark.toml

@@ -1,7 +1,10 @@
 # The System theme derives all of its colors from the platform palette
 # (e.g. qt6ct's custom color scheme on Linux), so it must NOT ship palette
-# overrides. Only the identity app colors are provided here, so buttons keep
-# their classic greens while the actual palette stays native to the OS.
+# overrides. Only the identity and semantic app colors are provided here, so
+# buttons keep their classic greens while the actual palette stays native to
+# the OS.
 [AppColors]
 AccentStrong        = #ff148c3c
 AccentSoft          = #ff78c850
+Positive            = #ff6dd58c
+Negative            = #ffff8a80

cockatrice/themes/System/palette-default-light.toml

@@ -1,7 +1,10 @@
 # The System theme derives all of its colors from the platform palette
 # (e.g. qt6ct's custom color scheme on Linux), so it must NOT ship palette
-# overrides. Only the identity app colors are provided here, so buttons keep
-# their classic greens while the actual palette stays native to the OS.
+# overrides. Only the identity and semantic app colors are provided here, so
+# buttons keep their classic greens while the actual palette stays native to
+# the OS.
 [AppColors]
 AccentStrong        = #ff148c3c
 AccentSoft          = #ff78c850
+Positive            = #ff1b7f3b
+Negative            = #ffb3261e

cockatrice/themes/VelvetMarble/palette-default-dark.toml

@@ -71,4 +71,6 @@ Accent               = #8fa6c0
 [AppColors]
 AccentStrong         = #54687e
 AccentSoft           = #9db0c4
+Positive             = #6dd58c
+Negative             = #ff8a80
 

cockatrice/themes/VelvetMarble/palette-default-light.toml

@@ -71,4 +71,6 @@ Accent               = #54687e
 [AppColors]
 AccentStrong         = #54687e
 AccentSoft           = #9db0c4
+Positive             = #1b7f3b
+Negative             = #b3261e