#042339#042339

#042339 is a very dark, muted cyan. Relative luminance 0.015; OKLCH L 24.7% C 0.055 H 244.0°. Best body text is #FFFFFF at 16.10:1 contrast (WCAG AA passes).

Color values

HEX	#042339
RGB	rgb(4, 35, 57)
HSL	hsl(205, 87%, 12%)
HSV	hsv(205, 93%, 22%)
CMYK	cmyk(93%, 38.6%, 0%, 77.6%)
CIE-LAB	lab(12.75, -1.69, -17.41)
CIE-LCH	lch(12.75, 17.49, 264.46°)
OKLab	oklab(24.68% -0.0242 -0.0495)
OKLCH	oklch(24.68% 0.055 244)
XYZ	xyz(1.3893, 1.5231, 4.0909)
Luminance	0.0152 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042339 #391A04

analogous

#043935 #042339 #040839

triadic

#042339 #390423 #233904

tetradic

#042339 #350439 #391A04 #083904

square

#042339 #350439 #391A04 #083904

split-complementary

#042339 #390408 #393504

monochromatic

#02121D #02121D #042339 #084672 #0C69AB

Accessibility & contrast

On white

16.10

#042339 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#042339 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042339

16.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042339	#FFFFFF	#000000	##FFFFFF
##042339	1.00	16.10	1.30	16.10
#FFFFFF	16.10	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19243A

Deuteranopia (green-blind)

#111F39

Tritanopia (blue-blind)

#00282B

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #042339;
/* rgb */ color: rgb(4, 35, 57);
/* oklch */ color: oklch(24.7% 0.055 244.0);

Tailwind

colors: {
  custom: {
    50: '#4e5d6f',
    500: '#042339',
    950: '#000000',
  },
}

SCSS

$custom: #042339;
$custom-light: #4e5d6f;
$custom-dark: #000000;

JSON

{
  "hex": "#042339",
  "rgb": {
    "r": 4,
    "g": 35,
    "b": 57
  },
  "hsl": {
    "h": 204.906,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.24676,
    "c": 0.05508,
    "h": 244
  },
  "luminance": 0.01523
}

Semantic roles & 50–950 ramp

primary

#042339

secondary

#7B451E

accent

#822BFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020407

muted

#78797A

Preview Lab

Preview with #042339

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

Preview Lab → · Contrast checker → · Palette generator →