#183E57#183E57

#183E57 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.9% C 0.061 H 240.6°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#183E57
RGB	rgb(24, 62, 87)
HSL	hsl(204, 57%, 22%)
HSV	hsv(204, 72%, 34%)
CMYK	cmyk(72.4%, 28.7%, 0%, 65.9%)
CIE-LAB	lab(24.72, -4.28, -18.95)
CIE-LCH	lch(24.72, 19.43, 257.26°)
OKLab	oklab(34.9% -0.0301 -0.0534)
OKLCH	oklch(34.9% 0.061 240.6)
XYZ	xyz(3.8190, 4.3272, 9.6489)
Luminance	0.0433 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E57 #573118

analogous

#185751 #183E57 #181E57

triadic

#183E57 #57183E #3E5718

tetradic

#183E57 #511857 #573118 #1E5718

square

#183E57 #511857 #573118 #1E5718

split-complementary

#183E57 #57181E #575118

monochromatic

#071118 #0B1C27 #183E57 #256087 #3282B7

Accessibility & contrast

On white

11.26

#183E57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#183E57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E57

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E57	#FFFFFF	#000000	##FFFFFF
##183E57	1.00	11.26	1.87	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333E58

Deuteranopia (green-blind)

#2A3857

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183e57;
/* rgb */ color: rgb(24, 62, 87);
/* oklch */ color: oklch(34.9% 0.061 240.6);

Tailwind

colors: {
  custom: {
    50: '#5d7386',
    500: '#183e57',
    950: '#000000',
  },
}

SCSS

$custom: #183e57;
$custom-light: #5d7386;
$custom-dark: #000000;

JSON

{
  "hex": "#183e57",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 87
  },
  "hsl": {
    "h": 203.81,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.349,
    "c": 0.06127,
    "h": 240.6
  },
  "luminance": 0.04328
}

Semantic roles & 50–950 ramp

primary

#183E57

secondary

#8E5D3D

accent

#8448E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #183E57

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

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