I watched an interesting light show at a bar today. The rows of bottles above the bar had a continuous light bar behind them, a strip about 1/2” high. The light slowly changed through different colors. Most bottles were clear so nothing dramatic. But a green bottle.looked interesting:
…but I remember an odd moment on my ship in the Navy when I went to the ship’s store and bought a box of Good & Plenty and went to my bunk to read and munch on the candy. It was late enough that they had turned the white lights off and turned on the red lights (like in submarine movies), and as I poured the candies into my hand I realized they were absolutely indistinguishable from each other: I could not tell which ones were pink and which ones were white. It was an interesting moment, probably akin to your light show.
Looking at your title, I wonder if the odd colors have something to do with the peaks and troughs of the light waves. You know; constructive and destructive interference and all that high school physics stuff?