Wait if he can only see red than y not get some red and black paint, mix them together and u get dark red or u can get white paint to make it a light red or pink???
nah he only sees blood red and only recently started seeing pink. makes no sense but assuming he can't see dark red either.
Wait if he can only see red than y not get some red and black paint, mix them together and u get dark red or u can get white paint to make it a light red or pink???