Deep Sky Glass

#51d8f0

Notes

Deep Sky Glass (#51D8F0) is a true cyan with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (189°, 84%, 63%) 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

#51d8f0

RGB

rgb(81, 216, 240)

HSL

hsl(189, 84%, 63%)