#183C54#183C54

#183C54 is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.2% C 0.059 H 240.7°. Best body text is #FFFFFF at 11.58:1 contrast (WCAG AA passes).

Color values

HEX	#183C54
RGB	rgb(24, 60, 84)
HSL	hsl(204, 56%, 21%)
HSV	hsv(204, 71%, 33%)
CMYK	cmyk(71.4%, 28.6%, 0%, 67.1%)
CIE-LAB	lab(23.89, -4.13, -18.29)
CIE-LCH	lch(23.89, 18.75, 257.27°)
OKLab	oklab(34.19% -0.0288 -0.0515)
OKLCH	oklch(34.19% 0.059 240.7)
XYZ	xyz(3.5922, 4.0656, 8.9812)
Luminance	0.0407 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C54 #543018

analogous

#18544E #183C54 #181E54

triadic

#183C54 #54183C #3C5418

tetradic

#183C54 #4E1854 #543018 #1E5418

square

#183C54 #4E1854 #543018 #1E5418

split-complementary

#183C54 #54181E #544E18

monochromatic

#071118 #0A1A24 #183C54 #265E84 #3380B3

Accessibility & contrast

On white

11.58

#183C54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#183C54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C54

11.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C54	#FFFFFF	#000000	##FFFFFF
##183C54	1.00	11.58	1.81	11.58
#FFFFFF	11.58	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313C55

Deuteranopia (green-blind)

#293654

Tritanopia (blue-blind)

#004244

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183c54;
/* rgb */ color: rgb(24, 60, 84);
/* oklch */ color: oklch(34.2% 0.059 240.7);

Tailwind

colors: {
  custom: {
    50: '#5d7184',
    500: '#183c54',
    950: '#000000',
  },
}

SCSS

$custom: #183c54;
$custom-light: #5d7184;
$custom-dark: #000000;

JSON

{
  "hex": "#183c54",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 84
  },
  "hsl": {
    "h": 204,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34186,
    "c": 0.059,
    "h": 240.7
  },
  "luminance": 0.04066
}

Semantic roles & 50–950 ramp

primary

#183C54

secondary

#8B5C3D

accent

#8549DF

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #183C54

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

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