Multi-material Spotify logo Cherry MX keycap. My keyboard was white so I used white PLA + clear PLA, but it would probably look great with black PLA + white PLA for the logo.

I would make the stem the same color as the logo, so that it's not very visible through the top of the keycap. For example, if you're using clear PLA like in my photo, you would also want to print the stem in clear PLA as well.

You need to use your slicer (e.g. PrusaSlicer -> "Split to parts") or Meshmixer (Edit -> Separate Shells) to split this into parts so you can assign separate colors for the logo, otherwise it'll just look like a blank keycap.