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Can you tell me something about your color perception deck? Are you trying to train yourself to be better at distinguising (and naming?) colours for some reason?
Yes, I train color distinctions. Every card has two colors and shows them plus a color name then the user has to decide which color Anki displayed. Over times the distance between the colors goes down and I pick colors that are more near to each other.
I have written about this on LW in the past.