If you only had access to white LEDs (for some reason, I don't know this is just a hypothetical if situation) there's a really handy series of lacquers made by
Tamiya that are focused on RC car painting that are transparent and bond well to various plexiglass materials like PETG and lexan/polycarbonate. One benefit of this would be the consistent colour in photos without the lights on so people taking your picture without your consent still get the full beauty of your design.
And yes, I realized that my first sentence hypothetical was made moot by the explanation in the second. I'm leaving it because today you get full on unfiltered TurboCharizard.