[pkilgore]

Unsure what you mean by "cultural references", but rainbows and gradients tend to be the best means to visually answer the question:

"What range of colors can these LEDs I'm selling display."

[fimdomeio]

maybe cultural context would make more sense. I mean I was always into things like punk and more dark aesthetics, so maybe it just doesn't make sense to me personally but would make sense for someone who as different contexts.