The Punisher skull logo on a sign. Designed for changing filaments during the print process to get 2 color print.
In photos I used a transparent yellow for the base and a black filament for the logo and edge.
I added an extra version with a hole in top so it can be hung as a keychain or on a backpack ect. Just remember to scale down if used for a keychain.
It works fine as a 1-color print, but I designed it with the purpose of replacing your filament after approx. 50% printing height.
So check you slicer software layers for when the base is printed and maybe add an extra layer to be sure. Then set your software to pause here or do it manually during the printing process. Then simply change your filament and continue printing.
My own first print was scaled down to height/Z: 4mm in Cura and I paused the print after the 10th layer.
Remember to use filaments with good contrast against each other and I'd advice you to use a light color for the base and a dark color for the logo. Although a black base with a white skull might look cool?
I modified a free use punisher logo for better 3D printing by enlarging the nostrils and widening the gap between the teeth. Then i put in on a base with a edge/rim.