Ah! I think I changed something in the description on ith.io, but I didn't touch the code. As for obtaining colors, it follows a fixed formula (it's a pretty small and simple script). ColorCalc follows a reference formula (which makes it more open, but less “practical” precisely because it needs that reference). As you can see, I've tried to address the issue of color in some scripts, but the good thing (and what makes it very difficult) is that there are no correct colors, only personal tastes.