You can print each part with a different filament and then glue them together.
I gave it a tolerance of 0.2mm, if it still doesn’t fit you can scale down the color part by a 1-2%, but it should fit anyways, you may not even need glue.
Print Settings
Rafts:
Doesn’t Matter
Supports:
No
Infill:
10 – 15
Post-Printing
You may need to sand it down just a little
Credits:
Octimusocti