I think that, while a colorblind version (if this means that the entire app is in black & white? i’m not really sure what the entire idea is) of v2 would be interesting, I also don’t think it would cater to the majority of people. Having an entire app be in black & white, while it would work for a certain niche of people, wouldn’t serve the entire userbase of the app in the same way, if that makes sense. I think maybe a better option would be a colorblind mode, where there could be different choices as to how the app is displayed. For instance, if someone were blue-green colorblind, and couldn’t distinguish between those certain shades, there could be an option to have some sort of colored overlay on the screen that would change the colors of the screen into a shade that they can see.
DISCLAIMER: I am not color-blind, and I don’t know a lot about colorblindness, this is just my two cents.