We didn’t run out of colors yet, but I feel “Red” is making it a bit confusing with “SketchUp”?
LayOut, Extension Warehouse and 3D Warehouse have their own colors.
I vote for Orange!
Although I have a thing for Cyan 
Can I get the icon in cornflower blue?
Ecru? Mauve? Smaragdine? Fulvous?
The Project 11 alpha category has a Purple color, why not just bring that forward ? (ie, still red but with some blue mixed in.)