[NilsIRL]

I think a before and after screenshot, with minimal configuration, would help to understand what it does, and see the "quality" of the results.

[iCarrot]

It has a demo page, "hidden" in the repo's description but not in README.md:

https://colinespinas.github.io/darken/

[Call_in]

You have a badge "Demo Available" too, I'll maybe do a more clear link.

[Call_in]

I'll do that for the next version, it is already planned, thanks for the feedback!