Color Blindness and HP Prime keys color choice

[alexzkter]

I don't think they need to be transparent stickers.
Matte white vinyl could we used and printed with the colours you think are most legible, I'd try keys as in the picture below.
Even make some of the shift-keys slightly bigger....if you have a special printer to do so. My parents do. It's an Epson surecolor sc-30600, but I'm unsure it can print things this little with the required resolution haha



Black vinyl over white keys would probably look cheap and non genuine...

maybe just matching the gray buttons to the white ones and of course making the 895623 shift-keys symbols bigger could be enough...