diff --git a/lib/graph3d/Settings.js b/lib/graph3d/Settings.js
index 45f6dd7b7..da146eb2a 100755
--- a/lib/graph3d/Settings.js
+++ b/lib/graph3d/Settings.js
@@ -488,6 +488,9 @@ function setSurfaceColor(surfaceColors, dst) {
   let rgbColors = [];
 
   if(Array.isArray(surfaceColors)) {
+    if(surfaceColors.length < 2) {
+      throw new Error('Surface colors array length must be 2 or above.');
+    }
     rgbColors = surfaceColors.map(function(colorCode){
       if(!util.isValidHex(colorCode)) {
         throw new Error('Invalid hex color code supplied to surfaceColors.');