The only issue I have with the red/green is that it doesn't look nearly as nice as the blue for the glowing parts.
For that reason I had to change the lense flares to match that colour because they didn't look right in green with the blue glow :X
Either way, as jcap has reminded me several times, blue is the generic forerunner colour for active, so I figure I'll end up sticking with the choice of colours we have now.