diff --git a/docs/static/icons/android-chrome-192x192.png b/docs/static/icons/android-chrome-192x192.png
index 0eff05db..274fb257 100644
Binary files a/docs/static/icons/android-chrome-192x192.png and b/docs/static/icons/android-chrome-192x192.png differ
diff --git a/sim/visuals/nodes/colorSensorView.ts b/sim/visuals/nodes/colorSensorView.ts
index 3e06c420..8539ce4e 100644
--- a/sim/visuals/nodes/colorSensorView.ts
+++ b/sim/visuals/nodes/colorSensorView.ts
@@ -36,7 +36,10 @@ namespace pxsim.visuals {
 
         private updateSensorLightVisual(color: string) {
             const sensorHole = this.content.getElementById(this.normalizeId(ColorSensorView.sensor_hole_id)) as SVGCircleElement;
-            sensorHole.style.fill = color;
+            sensorHole.style.stroke = color;
+            if (color != '#ffffff') {
+                sensorHole.style.strokeWidth = '2px';
+            }
         }
     }
 }
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