Thanks for this answer, I didn't notice that at first. You have to interact with the tank to know the color if you can't see said color. Quality of life improvement would be a sticker on the tank either with said color name on it, or a number system that allocate color name to numbers on said tank.
Its a bit much to ask too :P It is still doable for a completely color-blind person though, just more of a memory test than actually matching colors to create new one.