Quiet Sky Opal

#64c7dd

Notes

Quiet Sky Opal (#64C7DD) is a true cyan with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (191°, 64%, 63%) 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

#64c7dd

RGB

rgb(100, 199, 221)

HSL

hsl(191, 64%, 63%)