#183D4D#183D4D

#183D4D is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.1% C 0.050 H 229.2°. Best body text is #FFFFFF at 11.58:1 contrast (WCAG AA passes).

Color values

HEX	#183D4D
RGB	rgb(24, 61, 77)
HSL	hsl(198, 52%, 20%)
HSV	hsv(198, 69%, 30%)
CMYK	cmyk(68.8%, 20.8%, 0%, 69.8%)
CIE-LAB	lab(23.89, -7.45, -13.66)
CIE-LCH	lch(23.89, 15.56, 241.38°)
OKLab	oklab(34.08% -0.0329 -0.0382)
OKLCH	oklch(34.08% 0.05 229.2)
XYZ	xyz(3.3845, 4.0672, 7.6264)
Luminance	0.0407 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D4D #4D2818

analogous

#184D43 #183D4D #18234D

triadic

#183D4D #4D183D #3D4D18

tetradic

#183D4D #43184D #4D2818 #234D18

square

#183D4D #43184D #4D2818 #234D18

split-complementary

#183D4D #4D1823 #4D4318

monochromatic

#071217 #09181E #183D4D #27627C #3587AA

Accessibility & contrast

On white

11.58

#183D4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#183D4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D4D

11.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D4D	#FFFFFF	#000000	##FFFFFF
##183D4D	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)

#353C4E

Deuteranopia (green-blind)

#2D364D

Tritanopia (blue-blind)

#004242

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183d4d;
/* rgb */ color: rgb(24, 61, 77);
/* oklch */ color: oklch(34.1% 0.050 229.2);

Tailwind

colors: {
  custom: {
    50: '#5b727e',
    500: '#183d4d',
    950: '#000000',
  },
}

SCSS

$custom: #183d4d;
$custom-light: #5b727e;
$custom-dark: #000000;

JSON

{
  "hex": "#183d4d",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 77
  },
  "hsl": {
    "h": 198.113,
    "s": 52.475,
    "l": 19.804
  },
  "oklch": {
    "l": 0.34078,
    "c": 0.05041,
    "h": 229.2
  },
  "luminance": 0.04067
}

Semantic roles & 50–950 ramp

primary

#183D4D

secondary

#84523D

accent

#774CDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183D4D

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

Preview Lab → · Contrast checker → · Palette generator →