diff --git a/src/display/webgl.js b/src/display/webgl.js
index c102580d7..8a64dd406 100644
--- a/src/display/webgl.js
+++ b/src/display/webgl.js
@@ -360,7 +360,7 @@ var WebGLUtils = (function WebGLUtilsClosure() {
           for (var j = 0, jj = ps.length; j < jj; j++) {
             coords[pIndex] = coordsMap[ps[j]];
             coords[pIndex + 1] = coordsMap[ps[j] + 1];
-            colors[cIndex] = colorsMap[cs[i]];
+            colors[cIndex] = colorsMap[cs[j]];
             colors[cIndex + 1] = colorsMap[cs[j] + 1];
             colors[cIndex + 2] = colorsMap[cs[j] + 2];
             pIndex += 2;