diff --git a/share/qtcreator/themes/design-light.creatortheme b/share/qtcreator/themes/design-light.creatortheme
index 0490ffa8ca1..b5e54f2a34b 100644
--- a/share/qtcreator/themes/design-light.creatortheme
+++ b/share/qtcreator/themes/design-light.creatortheme
@@ -374,7 +374,7 @@ QmlDesigner_ScrollBarHandleColor=ff8b8e8f
 PaletteWindow=selectedBackground
 PaletteWindowText=text
 PaletteBase=normalBackground
-PaletteAlternateBase=alternateBackground
+PaletteAlternateBase=normalBackground
 PaletteButton=selectedBackground
 PaletteBrightText=selectedBackgroundText
 PaletteText=text
diff --git a/share/qtcreator/themes/design.creatortheme b/share/qtcreator/themes/design.creatortheme
index 3dcfb3e1d0d..613d89de6b6 100644
--- a/share/qtcreator/themes/design.creatortheme
+++ b/share/qtcreator/themes/design.creatortheme
@@ -430,8 +430,8 @@ PaletteBase=normalBackground
 
 
 
-;can't see where this is used.
-PaletteAlternateBase=alternateBackground
+;can't see where this is used. ;Used in plugin dialog
+PaletteAlternateBase=normalBackground
 ;PaletteAlternateBase=ffd3299a