color scheme

Has anyone ever made an acrylic tank with a bottom colored anything aside from the standard black clear white or blue? I have some spare sheets laying around solid orange, fluorescent orange, solid yellow etc. I was wondering if anyone had ever experimented with using other colors of acrylic on...

I have a 140 gallon tank that has been running for about a month now(no fish or corals only 1 snail and live rock. Will be adding sand shortly) and am planning on a giant cave in the middle with live rock. I want to color coordinate the tank. I want purple-ish blue on one side and a red and blue...