Kakaze, that piece of thing is BS written by people who haven't grown up with only black and white footage.
We only had a black and white TV at home, and I can tell you, pure red like santa's can be very recognized by its unique shade of gray.
I used to play that game for fun, guess the colours. You'd guess the colours of things in a video game, and then you'd play the video game on the television of a classmate who DID have colour tv. And I can tell you, you guess right about 4 out of 5 times, even on objects you can't posibly logically determine the colour of.
(yeah we had weird games as kids.
)
