A quick bookmark design I made as I was exploring multi-color printing.

If you want to print this with two colors, the sun starts at layer 7 (1.4 mm). If you are using Cura, you can add a filament change to your print using: Extensions > Post-Processing > Modify G-Code > Add a script > Filament Change. You can use the settings from my screenshot or use your own.

I'd also recommend using the concentric top/bottom pattern in Cura. It creates a nice effect with the print lines matching the shape of the object.