#042137#042137

#042137 is a very dark, muted cyan. Relative luminance 0.014; OKLCH L 23.9% C 0.054 H 245.3°. Best body text is #FFFFFF at 16.43:1 contrast (WCAG AA passes).

Color values

HEX	#042137
RGB	rgb(4, 33, 55)
HSL	hsl(206, 86%, 12%)
HSV	hsv(206, 93%, 22%)
CMYK	cmyk(92.7%, 40%, 0%, 78.4%)
CIE-LAB	lab(11.89, -1.14, -17.36)
CIE-LCH	lch(11.89, 17.40, 266.25°)
OKLab	oklab(23.95% -0.0227 -0.0494)
OKLCH	oklch(23.95% 0.054 245.3)
XYZ	xyz(1.2832, 1.3892, 3.8142)
Luminance	0.0139 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042137 #371A04

analogous

#043734 #042137 #040837

triadic

#042137 #370421 #213704

tetradic

#042137 #340437 #371A04 #083704

square

#042137 #340437 #371A04 #083704

split-complementary

#042137 #370408 #373404

monochromatic

#02111D #02111D #042137 #084370 #0C65A9

Accessibility & contrast

On white

16.43

#042137 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#042137 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042137

16.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042137	#FFFFFF	#000000	##FFFFFF
##042137	1.00	16.43	1.28	16.43
#FFFFFF	16.43	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#172238

Deuteranopia (green-blind)

#0F1D37

Tritanopia (blue-blind)

#002629

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #042137;
/* rgb */ color: rgb(4, 33, 55);
/* oklch */ color: oklch(23.9% 0.054 245.3);

Tailwind

colors: {
  custom: {
    50: '#4d5b6e',
    500: '#042137',
    950: '#000000',
  },
}

SCSS

$custom: #042137;
$custom-light: #4d5b6e;
$custom-dark: #000000;

JSON

{
  "hex": "#042137",
  "rgb": {
    "r": 4,
    "g": 33,
    "b": 55
  },
  "hsl": {
    "h": 205.882,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.23949,
    "c": 0.05437,
    "h": 245.3
  },
  "luminance": 0.01389
}

Semantic roles & 50–950 ramp

primary

#042137

secondary

#79451E

accent

#862BFD

background

#F4F5F6

surface

#E7E9EB

border

#C3C5C6

text

#020407

muted

#78797A

Preview Lab

Preview with #042137

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →