I started a new subdirectory in the downloads section for user modified Indigo Magic schemes based on a suggestion from Stewart Pomeroy:
[...] I have a suggestion - how about some kind of depot of user modified Indigo Magic schemes? I use Gotham pretty frequently and have modified it and Indigo Magic to some more subtle and near-monochromatic hues and wonder if anyone else does this. [...] I've attached a couple I use a lot. I call one Empire and the other EmpireLight. Just make 2 dirs in the .desktop-hostname/schemes/ directory called Empire and EmpireLight and pull the respective prefixes off the BaseColorPalette files and place them in each one.
If anyone else has schemes they'd like to share let me know and I'll add them to the page.