Scaled 50% in X and Y only then print in 2 colors with the new PrusaSlicer. If you don't scale Z the color change height is 1mm.

Used these PLA:
https://www.amazon.com/Filament-1-75mm-ERYONE-Printing-Printer/dp/B07KFX9STF/ref=as_li_ss_tl?keywords=Copper+Silk+PLA&qid=1559496390&s=gateway&sr=8-7&linkCode=sl1&tag=restricteda01-20&linkId=727d71cb6499d61a41a7a3db08759703&language=en_US <- ERYONE Copper Silk
https://www.amazon.com/Filament-1-75mm-ERYONE-Printing-Printer/dp/B07KFX9STF/ref=as_li_ss_tl?keywords=Copper+Silk+PLA&qid=1559496390&s=gateway&sr=8-7&linkCode=sl1&tag=restricteda01-20&linkId=727d71cb6499d61a41a7a3db08759703&language=en_US <- Hatchbox Black PLA