#183E51#183E51

#183E51 is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.6% C 0.054 H 233.2°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#183E51
RGB	rgb(24, 62, 81)
HSL	hsl(200, 54%, 21%)
HSV	hsv(200, 70%, 32%)
CMYK	cmyk(70.4%, 23.5%, 0%, 68.2%)
CIE-LAB	lab(24.43, -6.59, -15.48)
CIE-LCH	lch(24.43, 16.82, 246.92°)
OKLab	oklab(34.57% -0.0325 -0.0433)
OKLCH	oklch(34.57% 0.054 233.2)
XYZ	xyz(3.5839, 4.2332, 8.4112)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E51 #512B18

analogous

#185147 #183E51 #182151

triadic

#183E51 #51183E #3E5118

tetradic

#183E51 #471851 #512B18 #215118

square

#183E51 #471851 #512B18 #215118

split-complementary

#183E51 #511821 #514718

monochromatic

#071218 #0A1A22 #183E51 #266280 #3486AF

Accessibility & contrast

On white

11.37

#183E51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#183E51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E51

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E51	#FFFFFF	#000000	##FFFFFF
##183E51	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353D52

Deuteranopia (green-blind)

#2D3751

Tritanopia (blue-blind)

#004344

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e51;
/* rgb */ color: rgb(24, 62, 81);
/* oklch */ color: oklch(34.6% 0.054 233.2);

Tailwind

colors: {
  custom: {
    50: '#5c7382',
    500: '#183e51',
    950: '#000000',
  },
}

SCSS

$custom: #183e51;
$custom-light: #5c7382;
$custom-dark: #000000;

JSON

{
  "hex": "#183e51",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 81
  },
  "hsl": {
    "h": 200,
    "s": 54.286,
    "l": 20.588
  },
  "oklch": {
    "l": 0.34566,
    "c": 0.05417,
    "h": 233.2
  },
  "luminance": 0.04234
}

Semantic roles & 50–950 ramp

primary

#183E51

secondary

#88563D

accent

#7B4ADE

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183E51

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

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