You're not wrong, but it's still good to give each color a unique shape to make it color blind friendly.Franka wrote: you always want things to be as visually clear as possible, so you can tell important numbers at a glance. You can put numbers on top of colors, as long as they don't blend. It's those icons that confuse the eye, so you have to do a double take to read the number (or at least I do).
(Not that I'm color blind,But it's something people always seem to be concerned about in the board and card game community that you never hear much about when it comes to videos games.)