diff --git a/engine/src/niftygui/Common/MatDefs/Nifty/NiftyQuadGrad.vert b/engine/src/niftygui/Common/MatDefs/Nifty/NiftyQuadGrad.vert
index 0ecaee4f2..e62b2b4cb 100644
--- a/engine/src/niftygui/Common/MatDefs/Nifty/NiftyQuadGrad.vert
+++ b/engine/src/niftygui/Common/MatDefs/Nifty/NiftyQuadGrad.vert
@@ -10,5 +10,5 @@ void main() {
     vec2 pos = (g_WorldViewProjectionMatrix * inPosition).xy;
     gl_Position = vec4(pos, 0.0, 1.0);
 
-    color = inIndex;
+    color = inColor;
 }
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