Rich Cobalt Marble

#31428c

Notes

Rich Cobalt Marble (#31428C) 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 (229°, 48%, 37%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX

#31428c

RGB

rgb(49, 66, 140)

HSL

hsl(229, 48%, 37%)