My keyring looked awfully empty and I'm an Onshape nerd so this exists now I guess.

The colours are staggered on different layers kind of like Hueforge models so you only need one colour swap per colour (unless you need to blend more for the right shade). You can use height range modifiers in the slicer to accomplish this.

As implied by the ‘unofficial’ in the summary, I just copied it from the image lol. I'm not entirely sure how to upload/license this model but I'll see what happens \_(ツ)_/