Using 3D printing I'd like to create a text oversized keycap that uses several strong LEDs to make the text light as red or green, depending on status. It's quite similar to what are called annunciators on aircraft:
I'd like to create an MX keycap with this ability and size with the backlighting changing from green to red to indicate something is on or off. I understand including the MX connector in the center, but how would I print a black panel and leave the text transparent, or at least transluscent?