diff --git a/Extras/excanvas.js b/Extras/excanvas.js
index 00b316c..41a64c3 100644
--- a/Extras/excanvas.js
+++ b/Extras/excanvas.js
@@ -456,7 +456,7 @@ if (!document.createElement('canvas').getContext) {
 
     var str, alpha = 1;
 
-    styleString = String(styleString);
+    styleString = String(styleString).toLowerCase();
     if (styleString.charAt(0) == '#') {
       str = styleString;
     } else if (/^rgb/.test(styleString)) {
@@ -1413,4 +1413,4 @@ if (!document.createElement('canvas').getContext) {
   DOMException = DOMException_;
 })();
 
-} // if
\ No newline at end of file
+} // if