A while ago I printed these Portal coasters.
Source model: https://www.printables.com/model/251559-portal-drink-coasters
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Did you painted them or did a 2 colours print ?
Two color print.
For complete @roller answer, you have devices which allow you to have one single extruder and provide several filaments of different colors too.
@PeleSpirit @topinambour_rex yes, you can. With a dual extruder printer. Or if pause the printer mid way through and change the filament, is recommend using a printer with filament detect, it should move to the side so your prints don't get damaged by the hotend.