diff --git a/browser/modules/Windows8WindowFrameColor.jsm b/browser/modules/Windows8WindowFrameColor.jsm
index 34e41fc17e48..a66080b2601e 100644
--- a/browser/modules/Windows8WindowFrameColor.jsm
+++ b/browser/modules/Windows8WindowFrameColor.jsm
@@ -9,7 +9,7 @@ this.EXPORTED_SYMBOLS = ["Windows8WindowFrameColor"];
 
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-Cu.import("resource://gre/modules/WindowsRegistry.jsm");
+let Registry = Cu.import("resource://gre/modules/WindowsRegistry.jsm").WindowsRegistry;
 
 const Windows8WindowFrameColor = {
   _windowFrameColor: null,
@@ -18,16 +18,26 @@ const Windows8WindowFrameColor = {
     if (this._windowFrameColor)
       return this._windowFrameColor;
 
-    let windowFrameColor = WindowsRegistry.readRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
-                                                      "Software\\Microsoft\\Windows\\DWM",
-                                                      "ColorizationColor");
+    const HKCU = Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER;
+    const dwmKey = "Software\\Microsoft\\Windows\\DWM";
+    let customizationColor = Registry.readRegKey(HKCU, dwmKey,
+                                                 "ColorizationColor");
     // The color returned from the Registry is in decimal form.
-    let windowFrameColorHex = windowFrameColor.toString(16);
+    let customizationColorHex = customizationColor.toString(16);
     // Zero-pad the number just to make sure that it is 8 digits.
-    windowFrameColorHex = ("00000000" + windowFrameColorHex).substr(-8);
-    let windowFrameColorArray = windowFrameColorHex.match(/../g);
-    let [pixelA, pixelR, pixelG, pixelB] = windowFrameColorArray.map(function(val) parseInt(val, 16));
+    customizationColorHex = ("00000000" + customizationColorHex).substr(-8);
+    let customizationColorArray = customizationColorHex.match(/../g);
+    let [unused, fgR, fgG, fgB] = customizationColorArray.map(function(val) parseInt(val, 16));
+    let colorizationColorBalance = Registry.readRegKey(HKCU, dwmKey,
+                                                       "ColorizationColorBalance");
+     // Window frame base color when Color Intensity is at 0, see bug 1004576.
+    let frameBaseColor = 217;
+    let alpha = colorizationColorBalance / 100;
 
-    return this._windowFrameColor = [pixelR, pixelG, pixelB];
+    // Alpha-blend the foreground color with the frame base color.
+    let r = Math.round(fgR * alpha + frameBaseColor * (1 - alpha));
+    let g = Math.round(fgG * alpha + frameBaseColor * (1 - alpha));
+    let b = Math.round(fgB * alpha + frameBaseColor * (1 - alpha));
+    return this._windowFrameColor = [r, g, b];
   },
 };