This is probably getting OT, but . . .
Originally Posted by bawxcar
I see black cars just the same as red and yellow. Easily.
Yes, but black is not the problem, necessarily. I don't remember (I suppose I could Google, but I'm lazy) from color studies which colors "disappear" first in low-level light, but some (maybe grays? or gray-greens?) tend to fade into the background sooner than others.