#183C51#183C51

#183C51 is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.055 H 237.1°. Best body text is #FFFFFF at 11.64:1 contrast (WCAG AA passes).

Color values

HEX	#183C51
RGB	rgb(24, 60, 81)
HSL	hsl(202, 54%, 21%)
HSV	hsv(202, 70%, 32%)
CMYK	cmyk(70.4%, 25.9%, 0%, 68.2%)
CIE-LAB	lab(23.74, -5.29, -16.55)
CIE-LCH	lch(23.74, 17.37, 252.26°)
OKLab	oklab(34.02% -0.03 -0.0464)
OKLCH	oklch(34.02% 0.055 237.1)
XYZ	xyz(3.4772, 4.0196, 8.3756)
Luminance	0.0402 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C51 #512D18

analogous

#185149 #183C51 #181F51

triadic

#183C51 #51183C #3C5118

tetradic

#183C51 #491851 #512D18 #1F5118

square

#183C51 #491851 #512D18 #1F5118

split-complementary

#183C51 #51181F #514918

monochromatic

#071118 #0A1922 #183C51 #265F80 #3482AF

Accessibility & contrast

On white

11.64

#183C51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183C51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C51

11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C51	#FFFFFF	#000000	##FFFFFF
##183C51	1.00	11.64	1.80	11.64
#FFFFFF	11.64	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323C52

Deuteranopia (green-blind)

#2A3651

Tritanopia (blue-blind)

#004143

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c51;
/* rgb */ color: rgb(24, 60, 81);
/* oklch */ color: oklch(34.0% 0.055 237.1);

Tailwind

colors: {
  custom: {
    50: '#5c7182',
    500: '#183c51',
    950: '#000000',
  },
}

SCSS

$custom: #183c51;
$custom-light: #5c7182;
$custom-dark: #000000;

JSON

{
  "hex": "#183c51",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 81
  },
  "hsl": {
    "h": 202.105,
    "s": 54.286,
    "l": 20.588
  },
  "oklch": {
    "l": 0.34017,
    "c": 0.0553,
    "h": 237.1
  },
  "luminance": 0.0402
}

Semantic roles & 50–950 ramp

primary

#183C51

secondary

#88593D

accent

#804ADE

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183C51

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

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