#183C57#183C57

#183C57 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.063 H 243.9°. Best body text is #FFFFFF at 11.52:1 contrast (WCAG AA passes).

Color values

HEX	#183C57
RGB	rgb(24, 60, 87)
HSL	hsl(206, 57%, 22%)
HSV	hsv(206, 72%, 34%)
CMYK	cmyk(72.4%, 31%, 0%, 65.9%)
CIE-LAB	lab(24.04, -2.96, -20.02)
CIE-LCH	lch(24.04, 20.23, 261.59°)
OKLab	oklab(34.36% -0.0277 -0.0565)
OKLCH	oklch(34.36% 0.063 243.9)
XYZ	xyz(3.7122, 4.1136, 9.6134)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C57 #573318

analogous

#185753 #183C57 #181D57

triadic

#183C57 #57183C #3C5718

tetradic

#183C57 #531857 #573318 #1D5718

square

#183C57 #531857 #573318 #1D5718

split-complementary

#183C57 #57181D #575318

monochromatic

#071118 #0B1B27 #183C57 #255D87 #327EB7

Accessibility & contrast

On white

11.52

#183C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C57

11.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C57	#FFFFFF	#000000	##FFFFFF
##183C57	1.00	11.52	1.82	11.52
#FFFFFF	11.52	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303D58

Deuteranopia (green-blind)

#273656

Tritanopia (blue-blind)

#004345

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183c57;
/* rgb */ color: rgb(24, 60, 87);
/* oklch */ color: oklch(34.4% 0.063 243.9);

Tailwind

colors: {
  custom: {
    50: '#5d7186',
    500: '#183c57',
    950: '#000000',
  },
}

SCSS

$custom: #183c57;
$custom-light: #5d7186;
$custom-dark: #000000;

JSON

{
  "hex": "#183c57",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 87
  },
  "hsl": {
    "h": 205.714,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.34362,
    "c": 0.06292,
    "h": 243.9
  },
  "luminance": 0.04114
}

Semantic roles & 50–950 ramp

primary

#183C57

secondary

#8E603D

accent

#8948E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #183C57

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

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