diff --git a/lib/graph3d/Settings.js b/lib/graph3d/Settings.js
index 786b4aa3e..45f6dd7b7 100755
--- a/lib/graph3d/Settings.js
+++ b/lib/graph3d/Settings.js
@@ -488,10 +488,8 @@ function setSurfaceColor(surfaceColors, dst) {
   let rgbColors = [];
 
   if(Array.isArray(surfaceColors)) {
-    // https://stackoverflow.com/questions/8027423/how-to-check-if-a-string-is-a-valid-hex-color-representation/8027444
-    const hexTestRegex = /^#([0-9A-F]{3}){1,2}$/i;
     rgbColors = surfaceColors.map(function(colorCode){
-      if(!hexTestRegex.test(colorCode)) {
+      if(!util.isValidHex(colorCode)) {
         throw new Error('Invalid hex color code supplied to surfaceColors.');
       }
       return util.hexToRGB(colorCode);