diff --git a/src/plugins/coco/cocolanguageclient.cpp b/src/plugins/coco/cocolanguageclient.cpp
index 242941e774e..7829d167c10 100644
--- a/src/plugins/coco/cocolanguageclient.cpp
+++ b/src/plugins/coco/cocolanguageclient.cpp
@@ -138,7 +138,21 @@ public:
     {
         setLineAnnotation(diag.message());
         setToolTip(diag.message());
+        if (optional<CocoDiagnosticSeverity> severity = diag.cocoSeverity()) {
+
+            const TextEditor::TextStyle style = styleForSeverity(*severity);
+            m_annotationColor =
+                    TextEditor::TextEditorSettings::fontSettings().formatFor(style).foreground();
+        }
     }
+
+    QColor annotationColor() const override
+    {
+        return m_annotationColor.isValid() ? m_annotationColor
+                                           : TextEditor::TextMark::annotationColor();
+    }
+
+    QColor m_annotationColor;
 };
 
 class CocoDiagnosticManager : public DiagnosticManager
@@ -171,8 +185,9 @@ private:
                                QTextCursor::KeepAnchor);
 
             const TextEditor::TextStyle style = styleForSeverity(*severity);
-            const QTextCharFormat format = TextEditor::TextEditorSettings::fontSettings()
-                                               .toTextCharFormat(style);
+            QTextCharFormat format = TextEditor::TextEditorSettings::fontSettings()
+                    .toTextCharFormat(style);
+            format.clearForeground();
             return QTextEdit::ExtraSelection{cursor, format};
         }
         return {};
diff --git a/src/plugins/texteditor/textmark.cpp b/src/plugins/texteditor/textmark.cpp
index 09a373f6a27..2f839d94137 100644
--- a/src/plugins/texteditor/textmark.cpp
+++ b/src/plugins/texteditor/textmark.cpp
@@ -155,13 +155,12 @@ void TextMark::paintAnnotation(QPainter &painter,
         return;
     }
 
-    const QColor &markColor = m_color.has_value()
-                                  ? Utils::creatorTheme()->color(m_color.value()).toHsl()
-                                  : painter.pen().color();
+    const QColor &markColor = annotationColor();
 
     const FontSettings &fontSettings = m_baseTextDocument->fontSettings();
     const AnnotationColors &colors = AnnotationColors::getAnnotationColors(
-        markColor, fontSettings.toTextCharFormat(C_TEXT).background().color());
+                markColor.isValid() ? markColor : painter.pen().color(),
+                fontSettings.toTextCharFormat(C_TEXT).background().color());
 
     painter.save();
     QLinearGradient grad(rects.fadeInRect.topLeft() - contentOffset,
@@ -355,6 +354,13 @@ bool TextMark::addToolTipContent(QLayout *target) const
     return true;
 }
 
+QColor TextMark::annotationColor() const
+{
+    if (m_color.has_value())
+        return Utils::creatorTheme()->color(*m_color).toHsl();
+    return {};
+}
+
 void TextMark::setIcon(const QIcon &icon)
 {
     m_icon = icon;
diff --git a/src/plugins/texteditor/textmark.h b/src/plugins/texteditor/textmark.h
index 2c69592aeed..6184861ce98 100644
--- a/src/plugins/texteditor/textmark.h
+++ b/src/plugins/texteditor/textmark.h
@@ -101,6 +101,7 @@ public:
     virtual void dragToLine(int lineNumber);
     void addToToolTipLayout(QGridLayout *target) const;
     virtual bool addToolTipContent(QLayout *target) const;
+    virtual QColor annotationColor() const;
 
     void setIcon(const QIcon &icon);
     void setIconProvider(const std::function<QIcon()> &iconProvider);