#042739#042739

#042739 is a dark, muted cyan. Relative luminance 0.018; OKLCH L 25.9% C 0.051 H 236.1°. Best body text is #FFFFFF at 15.51:1 contrast (WCAG AA passes).

Color values

HEX	#042739
RGB	rgb(4, 39, 57)
HSL	hsl(200, 87%, 12%)
HSV	hsv(200, 93%, 22%)
CMYK	cmyk(93%, 31.6%, 0%, 77.6%)
CIE-LAB	lab(14.24, -4.56, -15.07)
CIE-LCH	lch(14.24, 15.74, 253.18°)
OKLab	oklab(25.86% -0.0286 -0.0426)
OKLCH	oklch(25.86% 0.051 236.1)
XYZ	xyz(1.5138, 1.7721, 4.1324)
Luminance	0.0177 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042739 #391604

analogous

#043931 #042739 #040D39

triadic

#042739 #390427 #273904

tetradic

#042739 #310439 #391604 #0D3904

square

#042739 #310439 #391604 #0D3904

split-complementary

#042739 #39040D #393104

monochromatic

#02141D #02141D #042739 #084E72 #0C75AB

Accessibility & contrast

On white

15.51

#042739 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#042739 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042739

15.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042739	#FFFFFF	#000000	##FFFFFF
##042739	1.00	15.51	1.35	15.51
#FFFFFF	15.51	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E273A

Deuteranopia (green-blind)

#172239

Tritanopia (blue-blind)

#002C2D

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #042739;
/* rgb */ color: rgb(4, 39, 57);
/* oklch */ color: oklch(25.9% 0.051 236.1);

Tailwind

colors: {
  custom: {
    50: '#4e606f',
    500: '#042739',
    950: '#000000',
  },
}

SCSS

$custom: #042739;
$custom-light: #4e606f;
$custom-dark: #000000;

JSON

{
  "hex": "#042739",
  "rgb": {
    "r": 4,
    "g": 39,
    "b": 57
  },
  "hsl": {
    "h": 200.377,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.25856,
    "c": 0.05131,
    "h": 236.1
  },
  "luminance": 0.01772
}

Semantic roles & 50–950 ramp

primary

#042739

secondary

#7B3D1E

accent

#722BFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #042739

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

Preview Lab → · Contrast checker → · Palette generator →