Recently, my girlfriend came across a dead wheel bug (Arilus cristatus) on a sidewalk and noticed it wasn't quite the dusty gray that most wheel bugs are. It was much more vivid: its wings had a golden shimmer to them.
While the lighting isn't optimal, you can see the golden color pretty well. Compared to the normal color of a wheel bug, it's a noticeable difference.
I'll try to get a picture of two pinned wheel bugs side by side for a better comparison and will update this post soon. Isn't it neat? You never know what nature will throw at you.