#183C4D#183C4D

#183C4D is a dark, muted cyan. Relative luminance 0.040; OKLCH L 33.8% C 0.051 H 231.4°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#183C4D
RGB	rgb(24, 60, 77)
HSL	hsl(199, 52%, 20%)
HSV	hsv(199, 69%, 30%)
CMYK	cmyk(68.8%, 22.1%, 0%, 69.8%)
CIE-LAB	lab(23.54, -6.81, -14.20)
CIE-LCH	lch(23.54, 15.75, 244.38°)
OKLab	oklab(33.8% -0.0317 -0.0397)
OKLCH	oklch(33.8% 0.051 231.4)
XYZ	xyz(3.3316, 3.9614, 7.6088)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C4D #4D2918

analogous

#184D43 #183C4D #18224D

triadic

#183C4D #4D183C #3C4D18

tetradic

#183C4D #43184D #4D2918 #224D18

square

#183C4D #43184D #4D2918 #224D18

split-complementary

#183C4D #4D1822 #4D4318

monochromatic

#071217 #09181E #183C4D #27607C #3585AA

Accessibility & contrast

On white

11.72

#183C4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#183C4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C4D

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C4D	#FFFFFF	#000000	##FFFFFF
##183C4D	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343B4E

Deuteranopia (green-blind)

#2C364D

Tritanopia (blue-blind)

#004142

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183c4d;
/* rgb */ color: rgb(24, 60, 77);
/* oklch */ color: oklch(33.8% 0.051 231.4);

Tailwind

colors: {
  custom: {
    50: '#5b717e',
    500: '#183c4d',
    950: '#000000',
  },
}

SCSS

$custom: #183c4d;
$custom-light: #5b717e;
$custom-dark: #000000;

JSON

{
  "hex": "#183c4d",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 77
  },
  "hsl": {
    "h": 199.245,
    "s": 52.475,
    "l": 19.804
  },
  "oklch": {
    "l": 0.338,
    "c": 0.05079,
    "h": 231.4
  },
  "luminance": 0.03962
}

Semantic roles & 50–950 ramp

primary

#183C4D

secondary

#84543D

accent

#7A4CDC

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183C4D

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

Preview Lab → · Contrast checker → · Palette generator →