I found this earlier today and thought id give it a spin. It adds settings to the Current Theme settings so you can easily change the colors of your default and custom themes.
https://custom.simplemachines.org/mods/index.php?mod=4231
Here's my work of art. I call it "Color Blind" :rofl1:
https://skhilled.com/color/index.php
Looks like you have some color there but what do I know.............I'm partially color blind (for real)
I just picked random colors to see how it works. LOL
Wow! Yes, you do have a colorful theme there! :hah: