Cool Cobalt Bone

#3d3d4d

Notes

Cool Cobalt Bone (#3D3D4D) is a deep 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°, 12%, 27%) places it in the muted band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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

#3d3d4d

RGB

rgb(61, 61, 77)

HSL

hsl(240, 12%, 27%)