diff --git a/widget/cocoa/nsMacDockSupport.mm b/widget/cocoa/nsMacDockSupport.mm
index 94c07b9de185..7929755aa14f 100644
--- a/widget/cocoa/nsMacDockSupport.mm
+++ b/widget/cocoa/nsMacDockSupport.mm
@@ -8,6 +8,7 @@
 #include "nsComponentManagerUtils.h"
 #include "nsMacDockSupport.h"
 #include "nsObjCExceptions.h"
+#include "nsNativeThemeColors.h"
 
 NS_IMPL_ISUPPORTS(nsMacDockSupport, nsIMacDockSupport, nsITaskbarProgress)
 
@@ -44,12 +45,12 @@ NS_IMPL_ISUPPORTS(nsMacDockSupport, nsIMacDockSupport, nsITaskbarProgress)
   [[NSColor colorWithDeviceWhite:0 alpha:0.1] setFill];
   [path fill];
 
-  // Draw a blue or gray fill (depending on graphite or not) for the progress part.
+  // Draw a fill in the control accent color for the progress part.
   NSRect progressFillRect = self.bounds;
   progressFillRect.size.width *= mFractionValue;
   [NSGraphicsContext saveGraphicsState];
   [NSBezierPath clipRect:progressFillRect];
-  [[NSColor keyboardFocusIndicatorColor] setFill];
+  [ControlAccentColor() setFill];
   [path fill];
   [NSGraphicsContext restoreGraphicsState];
 
diff --git a/widget/cocoa/nsNativeThemeCocoa.mm b/widget/cocoa/nsNativeThemeCocoa.mm
index 441725315cfe..338f5fd9d1f7 100644
--- a/widget/cocoa/nsNativeThemeCocoa.mm
+++ b/widget/cocoa/nsNativeThemeCocoa.mm
@@ -2664,12 +2664,6 @@ void nsNativeThemeCocoa::DrawSourceList(CGContextRef cgContext, const CGRect& in
   CGColorSpaceRelease(rgb);
 }
 
-#if !defined(MAC_OS_X_VERSION_10_14) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_14
-@interface NSColor (NSColorControlAccentColor)
-@property(class, strong, readonly) NSColor* controlAccentColor NS_AVAILABLE_MAC(10_14);
-@end
-#endif
-
 void nsNativeThemeCocoa::DrawSourceListSelection(CGContextRef aContext, const CGRect& aRect,
                                                  bool aWindowIsActive, bool aSelectionIsActive) {
   if (!nsCocoaFeatures::OnYosemiteOrLater()) {
@@ -2688,16 +2682,7 @@ void nsNativeThemeCocoa::DrawSourceListSelection(CGContextRef aContext, const CG
   NSColor* fillColor;
   if (aSelectionIsActive) {
     // Active selection, blue or graphite.
-    if (@available(macOS 10.14, *)) {
-      fillColor = [NSColor controlAccentColor];
-    } else {
-      // Pre-10.14, use hardcoded colors.
-      if ([NSColor currentControlTint] == NSGraphiteControlTint) {
-        fillColor = [NSColor colorWithSRGBRed:0.635 green:0.635 blue:0.655 alpha:1.0];
-      } else {
-        fillColor = [NSColor colorWithSRGBRed:0.247 green:0.584 blue:0.965 alpha:1.0];
-      }
-    }
+    fillColor = ControlAccentColor();
   } else {
     // Inactive selection, gray.
     if (aWindowIsActive) {
diff --git a/widget/cocoa/nsNativeThemeColors.h b/widget/cocoa/nsNativeThemeColors.h
index 670eea59b715..b896b536dabd 100644
--- a/widget/cocoa/nsNativeThemeColors.h
+++ b/widget/cocoa/nsNativeThemeColors.h
@@ -31,20 +31,37 @@ static const int sYosemiteThemeColors[][2] = {
     {0xB3, 0xD1},  // bottom separator line
 };
 
-__attribute__((unused)) static int NativeGreyColorAsInt(ColorName name, BOOL isMain) {
+inline int NativeGreyColorAsInt(ColorName name, BOOL isMain) {
   if (nsCocoaFeatures::OnYosemiteOrLater()) return sYosemiteThemeColors[name][isMain ? 0 : 1];
   return sLionThemeColors[name][isMain ? 0 : 1];
 }
 
-__attribute__((unused)) static float NativeGreyColorAsFloat(ColorName name, BOOL isMain) {
+inline float NativeGreyColorAsFloat(ColorName name, BOOL isMain) {
   return NativeGreyColorAsInt(name, isMain) / 255.0f;
 }
 
-__attribute__((unused)) static void DrawNativeGreyColorInRect(CGContextRef context, ColorName name,
-                                                              CGRect rect, BOOL isMain) {
+inline void DrawNativeGreyColorInRect(CGContextRef context, ColorName name, CGRect rect,
+                                      BOOL isMain) {
   float grey = NativeGreyColorAsFloat(name, isMain);
   CGContextSetRGBFillColor(context, grey, grey, grey, 1.0f);
   CGContextFillRect(context, rect);
 }
 
+#if !defined(MAC_OS_X_VERSION_10_14) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_14
+@interface NSColor (NSColorControlAccentColor)
+@property(class, strong, readonly) NSColor* controlAccentColor NS_AVAILABLE_MAC(10_14);
+@end
+#endif
+
+inline NSColor* ControlAccentColor() {
+  if (@available(macOS 10.14, *)) {
+    return [NSColor controlAccentColor];
+  }
+
+  // Pre-10.14, use hardcoded colors.
+  return [NSColor currentControlTint] == NSGraphiteControlTint
+             ? [NSColor colorWithSRGBRed:0.635 green:0.635 blue:0.655 alpha:1.0]
+             : [NSColor colorWithSRGBRed:0.247 green:0.584 blue:0.965 alpha:1.0];
+}
+
 #endif  // nsNativeThemeColors_h_