#183B53#183B53

#183B53 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.9% C 0.059 H 241.4°. Best body text is #FFFFFF at 11.74:1 contrast (WCAG AA passes).

Color values

HEX	#183B53
RGB	rgb(24, 59, 83)
HSL	hsl(204, 55%, 21%)
HSV	hsv(204, 71%, 33%)
CMYK	cmyk(71.1%, 28.9%, 0%, 67.5%)
CIE-LAB	lab(23.49, -3.86, -18.25)
CIE-LCH	lch(23.49, 18.65, 258.05°)
OKLab	oklab(33.86% -0.028 -0.0514)
OKLCH	oklch(33.86% 0.059 241.4)
XYZ	xyz(3.5014, 3.9463, 8.7591)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B53 #533018

analogous

#18534D #183B53 #181D53

triadic

#183B53 #53183B #3B5318

tetradic

#183B53 #4D1853 #533018 #1D5318

square

#183B53 #4D1853 #533018 #1D5318

split-complementary

#183B53 #53181D #534D18

monochromatic

#071118 #0A1924 #183B53 #265D82 #337EB2

Accessibility & contrast

On white

11.74

#183B53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#183B53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B53

11.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B53	#FFFFFF	#000000	##FFFFFF
##183B53	1.00	11.74	1.79	11.74
#FFFFFF	11.74	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303B54

Deuteranopia (green-blind)

#283553

Tritanopia (blue-blind)

#004143

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183b53;
/* rgb */ color: rgb(24, 59, 83);
/* oklch */ color: oklch(33.9% 0.059 241.4);

Tailwind

colors: {
  custom: {
    50: '#5c7083',
    500: '#183b53',
    950: '#000000',
  },
}

SCSS

$custom: #183b53;
$custom-light: #5c7083;
$custom-dark: #000000;

JSON

{
  "hex": "#183b53",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 83
  },
  "hsl": {
    "h": 204.407,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.33857,
    "c": 0.0585,
    "h": 241.4
  },
  "luminance": 0.03947
}

Semantic roles & 50–950 ramp

primary

#183B53

secondary

#8A5C3D

accent

#8649DE

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183B53

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

Preview Lab → · Contrast checker → · Palette generator →