Might just be because I'm stil "young", but my eyes don't feel strained with any color. :dunno:
I've driven with green, white, red, orange, and blue and didn't notice anything major. If it's too intense I simply dim it way down. Sometimes I drive with the dash nearly darkened out even with the Supra just so the dash is less distracting, but I never felt it was a big deal with any specific color.
If I do the white LED's for the dash, I'll just drive with it near complete dark on the dimmer when driving at night.
JJ: What do you think of all the NEW cars with white lighting? Are they all just idiots? It seems like they would know...