#042737#042737

#042737 is a dark, muted cyan. Relative luminance 0.018; OKLCH L 25.7% C 0.049 H 233.0°. Best body text is #FFFFFF at 15.55:1 contrast (WCAG AA passes).

Color values

HEX	#042737
RGB	rgb(4, 39, 55)
HSL	hsl(199, 86%, 12%)
HSV	hsv(199, 93%, 22%)
CMYK	cmyk(92.7%, 29.1%, 0%, 78.4%)
CIE-LAB	lab(14.13, -5.44, -13.83)
CIE-LCH	lch(14.13, 14.87, 248.52°)
OKLab	oklab(25.73% -0.0294 -0.039)
OKLCH	oklch(25.73% 0.049 233)
XYZ	xyz(1.4649, 1.7525, 3.8747)
Luminance	0.0175 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042737 #371404

analogous

#04372E #042737 #040D37

triadic

#042737 #370427 #273704

tetradic

#042737 #2E0437 #371404 #0D3704

square

#042737 #2E0437 #371404 #0D3704

split-complementary

#042737 #37040D #372E04

monochromatic

#02141D #02141D #042737 #084F70 #0C78A9

Accessibility & contrast

On white

15.55

#042737 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#042737 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042737

15.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042737	#FFFFFF	#000000	##FFFFFF
##042737	1.00	15.55	1.35	15.55
#FFFFFF	15.55	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F2738

Deuteranopia (green-blind)

#182237

Tritanopia (blue-blind)

#002B2C

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #042737;
/* rgb */ color: rgb(4, 39, 55);
/* oklch */ color: oklch(25.7% 0.049 233.0);

Tailwind

colors: {
  custom: {
    50: '#4e616e',
    500: '#042737',
    950: '#000000',
  },
}

SCSS

$custom: #042737;
$custom-light: #4e616e;
$custom-dark: #000000;

JSON

{
  "hex": "#042737",
  "rgb": {
    "r": 4,
    "g": 39,
    "b": 55
  },
  "hsl": {
    "h": 198.824,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.2573,
    "c": 0.04889,
    "h": 233
  },
  "luminance": 0.01753
}

Semantic roles & 50–950 ramp

primary

#042737

secondary

#793A1E

accent

#6D2BFD

background

#F4F5F6

surface

#E7E9EB

border

#C3C5C6

text

#020507

muted

#78797A

Preview Lab

Preview with #042737

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

Preview Lab → · Contrast checker → · Palette generator →