Cool Aqua Opal

#40b3b5

Notes

Cool Aqua Opal (#40B3B5) is a true cyan with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (181°, 48%, 48%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. 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

#40b3b5

RGB

rgb(64, 179, 181)

HSL

hsl(181, 48%, 48%)