I threw this together for someone and thought I'd share.
Just use the text feature in your slicer to add custom text. It should be 1.5mm high to be flush with the outline of the model. See my slicer screenshot for details.
For the font I found that “Noasarck” By NAL looks best (free link) but any sans-serif font should work.
Just do a filament change at height to do the multicolor. If you slice at .20 and don't change the size it should be around layer 30.
The author marked this model as their own original creation.