>>26053
https://paintschainer.preferred.tech/index_en.html
I used this tool to color that picture. You need to provide some hints what colors you want to use for coloring regions like hair or skin
But it is not very good.

This program should do it way better but it is not yet finished
https://github.com/lllyasviel/style2paints
looks very promising I hope it will be free when released.

Maybe Jim could use it as well to color his sketches ;)