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Onyx

#403F37

A deep, muted onyx — sophisticated balance of hue and saturation that conveys composure and subtle refinement, well-suited to modern, minimalist design.

Psychology

Gray is the connective tissue of interface design — neutral, balanced, and quiet. It supports without competing.

Meaning

Sophistication, neutrality, and restraint. Warm grays feel inviting; cool grays feel modern and technical.

Applications

Essential for backgrounds, borders, dividers, and secondary text in product UIs. Build a 9–11 step gray ramp early in any design system.

Conversion

HEX
403F37
RGB
64, 63, 55
HSL
53, 8%, 23%
HSB
53, 14%, 25%
CMYK
0, 2, 14, 75
LAB
27, -1, 5
LCH
27, 5, 99
OKLCH
0.37, 0.01, 101
XYZ
5, 5, 4
LUV
27, 1, 6
HWB
53, 22%, 75%
Pantone
Black 7 C

Harmonies

Analogous
Complementary
Split Complementary
Triadic
Tetradic
Square

Shades & tints

Similar named colors

Browse every named black on shades of black, or all families on colors.