EDIT: BUT, red might work a little nicer for Taiko than a brown. Green pink red.I disagree. Red is too close in colour to pink. Taiko drums are orange/brown, right?
Edit: How about having them in order so that taiko is on top, behind is osu and ctb comes afterwards. Just so you can see all the Js on the top left side on all the three cards. The top left letter on the taiko card can't be seen for now.