That depends entirely on if I'm right or not.
I looked up the word "blind" under Mr Zoat's username on SB and didn't find anything having to do with color blindness. Admittedly, I skimmed, but still.
In that case, unless Zoat tells us himself that's he's 'colour blind' (gotta add that British flair), I'm going to choose to believe that this is all conjecture. With all due respect and courtesy to those involved, of course.