Deep Cobalt Crystal

#333399

Notes

Deep Cobalt Crystal (#333399) is a true blue 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 (240°, 50%, 40%) 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 yellow. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#333399

RGB

rgb(51, 51, 153)

HSL

hsl(240, 50%, 40%)