YO Windows' colorblind feature now lets you adjust the strength of the filter. Massive W actually, I've been waiting for that for years. The red previously was too blown out and now it looks perfect!

This is a major thing that Linux is lacking for me. Someone made a Linux colorblind filter for me a couple years ago, but neither of us could figure out how to get it to work unfortunately. Windows remains the single best example of colorblind filters done right and it's not even close. I would say the next closest would be games that let you customize the colors of everything to whatever values you want, such as Back 4 Blood.