#183C4C#183C4C

#183C4C is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.7% C 0.050 H 229.8°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX	#183C4C
RGB	rgb(24, 60, 76)
HSL	hsl(198, 52%, 20%)
HSV	hsv(198, 68%, 30%)
CMYK	cmyk(68.4%, 21.1%, 0%, 70.2%)
CIE-LAB	lab(23.50, -7.19, -13.61)
CIE-LCH	lch(23.50, 15.39, 242.16°)
OKLab	oklab(33.75% -0.0321 -0.038)
OKLCH	oklch(33.75% 0.05 229.8)
XYZ	xyz(3.2965, 3.9474, 7.4243)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C4C #4C2818

analogous

#184C42 #183C4C #18224C

triadic

#183C4C #4C183C #3C4C18

tetradic

#183C4C #42184C #4C2818 #224C18

square

#183C4C #42184C #4C2818 #224C18

split-complementary

#183C4C #4C1822 #4C4218

monochromatic

#071217 #09171D #183C4C #27617B #3585A9

Accessibility & contrast

On white

11.73

#183C4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#183C4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C4C

11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C4C	#FFFFFF	#000000	##FFFFFF
##183C4C	1.00	11.73	1.79	11.73
#FFFFFF	11.73	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343B4D

Deuteranopia (green-blind)

#2D364C

Tritanopia (blue-blind)

#004041

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c4c;
/* rgb */ color: rgb(24, 60, 76);
/* oklch */ color: oklch(33.7% 0.050 229.8);

Tailwind

colors: {
  custom: {
    50: '#5b717e',
    500: '#183c4c',
    950: '#000000',
  },
}

SCSS

$custom: #183c4c;
$custom-light: #5b717e;
$custom-dark: #000000;

JSON

{
  "hex": "#183c4c",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 76
  },
  "hsl": {
    "h": 198.462,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.33747,
    "c": 0.04976,
    "h": 229.8
  },
  "luminance": 0.03948
}

Semantic roles & 50–950 ramp

primary

#183C4C

secondary

#83523D

accent

#784CDB

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040709

muted

#797A7B

Preview Lab

Preview with #183C4C

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

Preview Lab → · Contrast checker → · Palette generator →