#042839#042839

#042839 is a dark, muted cyan. Relative luminance 0.018; OKLCH L 26.2% C 0.051 H 234.0°. Best body text is #FFFFFF at 15.35:1 contrast (WCAG AA passes).

Color values

HEX	#042839
RGB	rgb(4, 40, 57)
HSL	hsl(199, 87%, 12%)
HSV	hsv(199, 93%, 22%)
CMYK	cmyk(93%, 29.8%, 0%, 77.6%)
CIE-LAB	lab(14.62, -5.25, -14.48)
CIE-LCH	lch(14.62, 15.41, 250.07°)
OKLab	oklab(26.15% -0.0297 -0.0409)
OKLCH	oklch(26.15% 0.051 234)
XYZ	xyz(1.5471, 1.8386, 4.1434)
Luminance	0.0184 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042839 #391504

analogous

#043930 #042839 #040E39

triadic

#042839 #390428 #283904

tetradic

#042839 #300439 #391504 #0E3904

square

#042839 #300439 #391504 #0E3904

split-complementary

#042839 #39040E #393004

monochromatic

#02141D #02141D #042839 #085072 #0C78AB

Accessibility & contrast

On white

15.35

#042839 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#042839 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042839

15.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042839	#FFFFFF	#000000	##FFFFFF
##042839	1.00	15.35	1.37	15.35
#FFFFFF	15.35	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20283A

Deuteranopia (green-blind)

#182339

Tritanopia (blue-blind)

#002C2E

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #042839;
/* rgb */ color: rgb(4, 40, 57);
/* oklch */ color: oklch(26.2% 0.051 234.0);

Tailwind

colors: {
  custom: {
    50: '#4e616f',
    500: '#042839',
    950: '#000000',
  },
}

SCSS

$custom: #042839;
$custom-light: #4e616f;
$custom-dark: #000000;

JSON

{
  "hex": "#042839",
  "rgb": {
    "r": 4,
    "g": 40,
    "b": 57
  },
  "hsl": {
    "h": 199.245,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.26154,
    "c": 0.05055,
    "h": 234
  },
  "luminance": 0.01839
}

Semantic roles & 50–950 ramp

primary

#042839

secondary

#7B3C1E

accent

#6E2BFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #042839

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

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