From reading the name of the project I wouldn‘t have guessed it‘s a color scheme for a lot of apps.
I wouldn‘t even thought of that as a viable market. Congratulations to you. This is amazing.
I think the most valuable lesson here is, that there is a market for a lot more things than we would have thought a few years/decades back. Kind of how Spotify enable niche band to have successes outside the mainstream, just by allowing people to listen to every fringe corner of the musical ecosystem.