#042837#042837

#042837 is a dark, muted cyan. Relative luminance 0.018; OKLCH L 26.0% C 0.048 H 230.7°. Best body text is #FFFFFF at 15.40:1 contrast (WCAG AA passes).

Color values

HEX	#042837
RGB	rgb(4, 40, 55)
HSL	hsl(198, 86%, 12%)
HSV	hsv(198, 93%, 22%)
CMYK	cmyk(92.7%, 27.3%, 0%, 78.4%)
CIE-LAB	lab(14.51, -6.13, -13.25)
CIE-LCH	lch(14.51, 14.60, 245.17°)
OKLab	oklab(26.03% -0.0306 -0.0373)
OKLCH	oklch(26.03% 0.048 230.7)
XYZ	xyz(1.4982, 1.8190, 3.8858)
Luminance	0.0182 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042837 #371304

analogous

#04372D #042837 #040F37

triadic

#042837 #370428 #283704

tetradic

#042837 #2D0437 #371304 #0F3704

square

#042837 #2D0437 #371304 #0F3704

split-complementary

#042837 #37040F #372D04

monochromatic

#02151D #02151D #042837 #085170 #0C7BA9

Accessibility & contrast

On white

15.40

#042837 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#042837 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042837

15.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042837	#FFFFFF	#000000	##FFFFFF
##042837	1.00	15.40	1.36	15.40
#FFFFFF	15.40	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#202738

Deuteranopia (green-blind)

#192337

Tritanopia (blue-blind)

#002C2D

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #042837;
/* rgb */ color: rgb(4, 40, 55);
/* oklch */ color: oklch(26.0% 0.048 230.7);

Tailwind

colors: {
  custom: {
    50: '#4e616d',
    500: '#042837',
    950: '#000000',
  },
}

SCSS

$custom: #042837;
$custom-light: #4e616d;
$custom-dark: #000000;

JSON

{
  "hex": "#042837",
  "rgb": {
    "r": 4,
    "g": 40,
    "b": 55
  },
  "hsl": {
    "h": 197.647,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.26031,
    "c": 0.04826,
    "h": 230.7
  },
  "luminance": 0.01819
}

Semantic roles & 50–950 ramp

primary

#042837

secondary

#79391E

accent

#692BFD

background

#F4F5F6

surface

#E7E9EB

border

#C3C5C6

text

#020507

muted

#78797A

Preview Lab

Preview with #042837

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

Preview Lab → · Contrast checker → · Palette generator →