I noticed a discussion about the tracer color in the beginning of this mamoth topic, and didnt care to check, but red would deffinately NOT be a good alternative, and I think the color is quite historically correct tbh.
http://www.ww2incolor.com/forum/arch...hp/t-7020.html
Some discussion on tracer rounds there .. fluorecent lime green ... that would be almost yellow as far as most colormaps go.