#042039#042039

#042039 is a very dark, muted cyan. Relative luminance 0.014; OKLCH L 23.8% C 0.059 H 249.0°. Best body text is #FFFFFF at 16.53:1 contrast (WCAG AA passes).

Color values

HEX	#042039
RGB	rgb(4, 32, 57)
HSL	hsl(208, 87%, 12%)
HSV	hsv(208, 93%, 22%)
CMYK	cmyk(93%, 43.9%, 0%, 77.6%)
CIE-LAB	lab(11.65, 0.55, -19.16)
CIE-LCH	lch(11.65, 19.17, 271.63°)
OKLab	oklab(23.81% -0.021 -0.0547)
OKLCH	oklch(23.81% 0.059 249)
XYZ	xyz(1.3048, 1.3541, 4.0627)
Luminance	0.0135 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042039 #391D04

analogous

#043938 #042039 #040639

triadic

#042039 #390420 #203904

tetradic

#042039 #380439 #391D04 #063904

square

#042039 #380439 #391D04 #063904

split-complementary

#042039 #390406 #393804

monochromatic

#02101D #02101D #042039 #084072 #0C60AB

Accessibility & contrast

On white

16.53

#042039 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#042039 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042039

16.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042039	#FFFFFF	#000000	##FFFFFF
##042039	1.00	16.53	1.27	16.53
#FFFFFF	16.53	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14213A

Deuteranopia (green-blind)

#0C1D39

Tritanopia (blue-blind)

#002629

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #042039;
/* rgb */ color: rgb(4, 32, 57);
/* oklch */ color: oklch(23.8% 0.059 249.0);

Tailwind

colors: {
  custom: {
    50: '#4e5b6f',
    500: '#042039',
    950: '#000000',
  },
}

SCSS

$custom: #042039;
$custom-light: #4e5b6f;
$custom-dark: #000000;

JSON

{
  "hex": "#042039",
  "rgb": {
    "r": 4,
    "g": 32,
    "b": 57
  },
  "hsl": {
    "h": 208.302,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.23805,
    "c": 0.05857,
    "h": 249
  },
  "luminance": 0.01354
}

Semantic roles & 50–950 ramp

primary

#042039

secondary

#7B4A1E

accent

#8E2BFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020407

muted

#78797A

Preview Lab

Preview with #042039

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

Preview Lab → · Contrast checker → · Palette generator →