Cave Biome Color Theory

I've noticed all currently revealed cave biomes sport earthy or neutral colors...

Lush, Dripstone - Earthy greens and browns

Regular, Deep Dark - Neutral Tones (Navy blue, gray, black)

To stop cave aesthetic from feeling too similar and possibly boring, there should be a cave biome that uses a brighter color palette, like yellow, pink, or violet. Maybe sand caves or glowing mushrooms?

This biome would serve a similar purpose that the warped forest did in 1.16, it's blue tones make it feel very refreshing in all the deep warm colors of the nether.