#183E4D#183E4D

#183E4D is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.4% C 0.050 H 227.0°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#183E4D
RGB	rgb(24, 62, 77)
HSL	hsl(197, 52%, 20%)
HSV	hsv(197, 69%, 30%)
CMYK	cmyk(68.8%, 19.5%, 0%, 69.8%)
CIE-LAB	lab(24.24, -8.09, -13.13)
CIE-LCH	lch(24.24, 15.42, 238.35°)
OKLab	oklab(34.36% -0.0342 -0.0366)
OKLCH	oklch(34.36% 0.05 227)
XYZ	xyz(3.4383, 4.1749, 7.6444)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E4D #4D2718

analogous

#184D42 #183E4D #18244D

triadic

#183E4D #4D183E #3E4D18

tetradic

#183E4D #42184D #4D2718 #244D18

square

#183E4D #42184D #4D2718 #244D18

split-complementary

#183E4D #4D1824 #4D4218

monochromatic

#071317 #09181E #183E4D #27647C #3589AA

Accessibility & contrast

On white

11.44

#183E4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183E4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E4D

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E4D	#FFFFFF	#000000	##FFFFFF
##183E4D	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363D4E

Deuteranopia (green-blind)

#2F374D

Tritanopia (blue-blind)

#004243

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e4d;
/* rgb */ color: rgb(24, 62, 77);
/* oklch */ color: oklch(34.4% 0.050 227.0);

Tailwind

colors: {
  custom: {
    50: '#5b737e',
    500: '#183e4d',
    950: '#000000',
  },
}

SCSS

$custom: #183e4d;
$custom-light: #5b737e;
$custom-dark: #000000;

JSON

{
  "hex": "#183e4d",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 77
  },
  "hsl": {
    "h": 196.981,
    "s": 52.475,
    "l": 19.804
  },
  "oklch": {
    "l": 0.34356,
    "c": 0.05011,
    "h": 227
  },
  "luminance": 0.04175
}

Semantic roles & 50–950 ramp

primary

#183E4D

secondary

#84513D

accent

#754CDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183E4D

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

Preview Lab → · Contrast checker → · Palette generator →