The Steam summer sale recommended I try Force of Elements, a match-3 F2P2W asynchronous PvP game in early release. Having enjoyed a bit of match-3 lately, I tried it out. In my second game, I found something really exciting: this game not only failed to take colorblind people into account, it went in the other direction and uses a “grayed out” mode as an attack to make it difficult to see what gems should match. That is one way of defining a problem into a feature.
Also note the “asynchronous PvP,” in that your opponents are computer-controlled versions of other players. This means using colorblindness as an attack only works against other humans, unless the computer imposes a different penalty upon itself in these cases.