#183C53#183C53

#183C53 is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.1% C 0.058 H 239.6°. Best body text is #FFFFFF at 11.60:1 contrast (WCAG AA passes).

Color values

HEX	#183C53
RGB	rgb(24, 60, 83)
HSL	hsl(203, 55%, 21%)
HSV	hsv(203, 71%, 33%)
CMYK	cmyk(71.1%, 27.7%, 0%, 67.5%)
CIE-LAB	lab(23.84, -4.52, -17.71)
CIE-LCH	lch(23.84, 18.28, 255.68°)
OKLab	oklab(34.13% -0.0292 -0.0498)
OKLCH	oklch(34.13% 0.058 239.6)
XYZ	xyz(3.5533, 4.0501, 8.7764)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C53 #532F18

analogous

#18534C #183C53 #181E53

triadic

#183C53 #53183C #3C5318

tetradic

#183C53 #4C1853 #532F18 #1E5318

square

#183C53 #4C1853 #532F18 #1E5318

split-complementary

#183C53 #53181E #534C18

monochromatic

#071118 #0A1A24 #183C53 #265E82 #3381B2

Accessibility & contrast

On white

11.60

#183C53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#183C53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C53

11.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C53	#FFFFFF	#000000	##FFFFFF
##183C53	1.00	11.60	1.81	11.60
#FFFFFF	11.60	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313C54

Deuteranopia (green-blind)

#293653

Tritanopia (blue-blind)

#004244

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183c53;
/* rgb */ color: rgb(24, 60, 83);
/* oklch */ color: oklch(34.1% 0.058 239.6);

Tailwind

colors: {
  custom: {
    50: '#5c7183',
    500: '#183c53',
    950: '#000000',
  },
}

SCSS

$custom: #183c53;
$custom-light: #5c7183;
$custom-dark: #000000;

JSON

{
  "hex": "#183c53",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 83
  },
  "hsl": {
    "h": 203.39,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34129,
    "c": 0.05774,
    "h": 239.6
  },
  "luminance": 0.0405
}

Semantic roles & 50–950 ramp

primary

#183C53

secondary

#8A5B3D

accent

#8349DE

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183C53

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

Preview Lab → · Contrast checker → · Palette generator →