#042439#042439

#042439 is a very dark, muted cyan. Relative luminance 0.016; OKLCH L 25.0% C 0.054 H 242.1°. Best body text is #FFFFFF at 15.95:1 contrast (WCAG AA passes).

Color values

HEX	#042439
RGB	rgb(4, 36, 57)
HSL	hsl(204, 87%, 12%)
HSV	hsv(204, 93%, 22%)
CMYK	cmyk(93%, 36.8%, 0%, 77.6%)
CIE-LAB	lab(13.13, -2.42, -16.82)
CIE-LCH	lch(13.13, 17.00, 261.83°)
OKLab	oklab(24.97% -0.0253 -0.0478)
OKLCH	oklch(24.97% 0.054 242.1)
XYZ	xyz(1.4192, 1.5828, 4.1008)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042439 #391904

analogous

#043934 #042439 #040939

triadic

#042439 #390424 #243904

tetradic

#042439 #340439 #391904 #093904

square

#042439 #340439 #391904 #093904

split-complementary

#042439 #390409 #393404

monochromatic

#02121D #02121D #042439 #084872 #0C6CAB

Accessibility & contrast

On white

15.95

#042439 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#042439 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042439

15.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042439	#FFFFFF	#000000	##FFFFFF
##042439	1.00	15.95	1.32	15.95
#FFFFFF	15.95	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A253A

Deuteranopia (green-blind)

#132039

Tritanopia (blue-blind)

#00292B

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #042439;
/* rgb */ color: rgb(4, 36, 57);
/* oklch */ color: oklch(25.0% 0.054 242.1);

Tailwind

colors: {
  custom: {
    50: '#4e5e6f',
    500: '#042439',
    950: '#000000',
  },
}

SCSS

$custom: #042439;
$custom-light: #4e5e6f;
$custom-dark: #000000;

JSON

{
  "hex": "#042439",
  "rgb": {
    "r": 4,
    "g": 36,
    "b": 57
  },
  "hsl": {
    "h": 203.774,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.24969,
    "c": 0.05403,
    "h": 242.1
  },
  "luminance": 0.01583
}

Semantic roles & 50–950 ramp

primary

#042439

secondary

#7B431E

accent

#7E2BFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020407

muted

#78797A

Preview Lab

Preview with #042439

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

Preview Lab → · Contrast checker → · Palette generator →