It's the opposite direction, but I'd go with diffraction grating glasses and tune the stage lights for maximum rainbow-ness.
(Diffraction gratings are basically a huge number of tiny parallel lines etched into a transparent medium like glass or film, and split any light into its component wavelengths, so you get rainbow halos around any light source that isn't a single source like red LEDs. Cheap ones on film are a spin-off of holography — it's really easy to get lasers to draw those lines by an interference pattern bouncing off objects — you can get 'em in cardboard frames, like the old red-blue 3d glasses; there was a vogue of selling them at fireworks stands to rainbow up displays. Amazon has them at under $10 for a pack of 25.)
...And, break-!That was really nice! Based on the way you were moving, it seemed like you got a burst of inspiration in the middle...Ah, you noticed that!? You really are perceptive! It's true!You know how when you go to see a 3D movie, they tell you 'Please put on your special glasses'?That's it! Wouldn't it be perfect to do that at my show!? And!!They'd have to be 'light up glasses'! The frames would glow!!If there's light around their eyes, wouldn't it be too much glare?Ugh-Ah! Then, sunglasses! They'd wear sunglasses underneath...Okay, break's overThe show is starting soonPlease put on your special Live glassesGlasses ON glassesBut then they wouldn't be able to see the stage as well, would they?Ghh~ I'm so close... It's just not enough...!Fight on, Haruna! For the glasses of tomorrow...!This unprecedented sense of glasses unity... It's this sudden bright idea, just for glasses!