So here are some color variations.
However as I said, the arm is incandescent, so it might as well by only that one orange color. Green would be cool given it's ultra high temperature but if the human eye can't see beyond yellow/orange, then there's no point to it.

Although the other colors look cool.
Well the yellow and blue ones were the most popular among my friends, along with the red cloth, so how about a mid tone armor with red cloth: