Hey there!

I just made this 3D file from a picture. I used eSun black PLA, eSun white PLA, Conjure chameleon PLA and Creality Green Hyper PLA for this print.

I used a PNG that I converted to SVG. Then simplified the model with Fusion360 and exported all different colors.
Import all the STL at the same time and load them as a "signle object with multiple parts" and they should be aligned. Then just change the colors.