Cool Aqua Opal

#21c8ed

Notes

Cool Aqua Opal (#21C8ED) is a true cyan with a neon character. It sits at the high-saturation edge of its family. Use it sparingly, as signage, accent, or highlight against darker surfaces. Its HSL profile (191°, 85%, 53%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary red. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#21c8ed

RGB

rgb(33, 200, 237)

HSL

hsl(191, 85%, 53%)