There are three different styles:
All models are parametric. If you're using a system like AMS or MMU, you could adapt one of the holders so that when you grab a filament, take the swatch with you so you can see what is loaded at a glance.
Fits these swatches:
https://www.printables.com/model/59972-compact-filament-swatch.
I used double-sided tape to keep the holders attached.
The author marked this model as their own original creation.