Cobalt Slate

#4b537c

Notes

Cobalt Slate (#4B537C) 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 (230°, 25%, 39%) places it in the muted 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

#4b537c

RGB

rgb(75, 83, 124)

HSL

hsl(230, 25%, 39%)