Dang, sorry about that. Bit of a faux pas to only represent something with colors. Especially the "dimmed" versions are problematic I guess. Usually I try to take such things into account but I guess it slipped my mind this weekend. Should've added icons to them or something like that...
In case it helps, other games relying on filling squares with only a few colours needed put an icon in the square (diamond, star, circle, squareception, triangle...) or change the square's shape within the "grid." I used accessibility on one such game doing the former that seamlessly integrated with the non-colourblind experience, since the squares were still overall The Colour.
Thanks for considering it.