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Onyx

#3F404E

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
3F404E
RGB
63, 64, 78
HSL
236, 11%, 28%
HSB
236, 19%, 31%
CMYK
19, 18, 0, 69
LAB
27, 2, -9
LCH
27, 9, 284
OKLCH
0.38, 0.02, 282
XYZ
5, 5, 8
LUV
27, -1, -11
HWB
236, 25%, 69%
Pantone
Cool Gray 11 C

Harmonies

Analogous
Complementary
Split Complementary
Triadic
Tetradic
Square

Shades & tints

Similar named colors

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