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Some earlier led keyboards were lit by led strips surrounding the clear plastic base those are easy to do with rgb led strips but i would get the 5050 rgb led strips because each led has 3 colors built in. just wrap around plastic base. note if you want get them in 5v strip and you would have to make 2 holes on backside for the inline controller so you could change color and patterns
you can also reverse the led strip to get a brighter border and add a second strip facing inward to light up etching. use white led for border and rgb strip fo etching. this way u get a brighter border independent from colored inside. I have done this type of lighting before on a pc to backlight the motherboard in case.