Hi! Glad you like it! Thank you for commenting!
I am currently rewriting its code completely, unfortunately it's too soon to think about such feature requests (but I think you will enjoy the upcoming version. please let me know if you don't like the changes in it!).
I have a lot to do still, but I can definitely keep future features in mind as I'm refactoring the code.
But what do you mean by "multi-color"? Do you mean like lighting different sections of your factories with different colors, or configuring each color light of a building individually?