not hard, you can order customer keycaps and pull off the old ones
do i need specific translucent kind to support the backlit rgb? would love a really subtle matte black set
yes but usually the labels of the keys are translucent and let the light through, lighting up the label of the key, and then giving a glow around the key caps. I think you would verify that with the custom key cap order
that should be the default is what I am saying