diff --git a/widget/cocoa/nsLookAndFeel.h b/widget/cocoa/nsLookAndFeel.h
index 744372fc8b4cb..b0189c37b95b0 100644
--- a/widget/cocoa/nsLookAndFeel.h
+++ b/widget/cocoa/nsLookAndFeel.h
@@ -64,8 +64,7 @@ class nsLookAndFeel final : public nsXPLookAndFeel {
   nscolor mColorGrid;
   nscolor mColorActiveBorder;
   nscolor mColorGrayText;
-  nscolor mColorInactiveBorder;
-  nscolor mColorInactiveCaption;
+  nscolor mColorControlBackground;
   nscolor mColorScrollbar;
   nscolor mColorThreeDHighlight;
   nscolor mColorDialog;
diff --git a/widget/cocoa/nsLookAndFeel.mm b/widget/cocoa/nsLookAndFeel.mm
index 257273c52a07e..848cf651616e6 100644
--- a/widget/cocoa/nsLookAndFeel.mm
+++ b/widget/cocoa/nsLookAndFeel.mm
@@ -67,8 +67,7 @@ - (NSAppearanceName)bestMatchFromAppearancesWithNames:(NSArray<NSAppearanceName>
       mColorGrid(0),
       mColorActiveBorder(0),
       mColorGrayText(0),
-      mColorInactiveBorder(0),
-      mColorInactiveCaption(0),
+      mColorControlBackground(0),
       mColorScrollbar(0),
       mColorThreeDHighlight(0),
       mColorDialog(0),
@@ -297,10 +296,8 @@ static nscolor GetColorFromNSColorWithAlpha(NSColor* aColor, float alpha) {
       aColor = mColorGrayText;
       break;
     case ColorID::Inactiveborder:
-      aColor = mColorInactiveBorder;
-      break;
     case ColorID::Inactivecaption:
-      aColor = mColorInactiveCaption;
+      aColor = mColorControlBackground;
       break;
     case ColorID::Inactivecaptiontext:
       aColor = NS_RGB(0x45, 0x45, 0x45);
@@ -697,7 +694,6 @@ static nscolor GetColorFromNSColorWithAlpha(NSColor* aColor, float alpha) {
       ColorID::Activeborder,
       ColorID::Graytext,
       ColorID::Inactiveborder,
-      ColorID::Inactivecaption,
       ColorID::Scrollbar,
       ColorID::Threedhighlight,
       ColorID::Fieldtext,
@@ -785,9 +781,7 @@ static nscolor GetColorFromNSColorWithAlpha(NSColor* aColor, float alpha) {
         case ColorID::Graytext:
           return mColorGrayText;
         case ColorID::Inactiveborder:
-          return mColorInactiveBorder;
-        case ColorID::Inactivecaption:
-          return mColorInactiveCaption;
+          return mColorControlBackground;
         case ColorID::Scrollbar:
           return mColorScrollbar;
         case ColorID::Threedhighlight:
@@ -883,8 +877,7 @@ static nscolor GetColorFromNSColorWithAlpha(NSColor* aColor, float alpha) {
   mColorActiveBorder = GetColorFromNSColor([NSColor keyboardFocusIndicatorColor]);
   NSColor* disabledColor = [NSColor disabledControlTextColor];
   mColorGrayText = GetColorFromNSColorWithAlpha(disabledColor, [disabledColor alphaComponent]);
-  mColorInactiveBorder = GetColorFromNSColor([NSColor controlBackgroundColor]);
-  mColorInactiveCaption = GetColorFromNSColor([NSColor controlBackgroundColor]);
+  mColorControlBackground = GetColorFromNSColor([NSColor controlBackgroundColor]);
   mColorScrollbar = GetColorFromNSColor([NSColor scrollBarColor]);
   mColorThreeDHighlight = GetColorFromNSColor([NSColor highlightColor]);
   mColorDialog = GetColorFromNSColor([NSColor controlHighlightColor]);