#183D4C#183D4C

#183D4C is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.0% C 0.049 H 227.5°. Best body text is #FFFFFF at 11.60:1 contrast (WCAG AA passes).

Color values

HEX	#183D4C
RGB	rgb(24, 61, 76)
HSL	hsl(197, 52%, 20%)
HSV	hsv(197, 68%, 30%)
CMYK	cmyk(68.4%, 19.7%, 0%, 70.2%)
CIE-LAB	lab(23.85, -7.83, -13.07)
CIE-LCH	lch(23.85, 15.23, 239.09°)
OKLab	oklab(34.03% -0.0334 -0.0365)
OKLCH	oklch(34.03% 0.049 227.5)
XYZ	xyz(3.3494, 4.0531, 7.4419)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D4C #4C2718

analogous

#184C41 #183D4C #18234C

triadic

#183D4C #4C183D #3D4C18

tetradic

#183D4C #41184C #4C2718 #234C18

square

#183D4C #41184C #4C2718 #234C18

split-complementary

#183D4C #4C1823 #4C4118

monochromatic

#071317 #09181D #183D4C #27627B #3588A9

Accessibility & contrast

On white

11.60

#183D4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#183D4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D4C

11.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D4C	#FFFFFF	#000000	##FFFFFF
##183D4C	1.00	11.60	1.81	11.60
#FFFFFF	11.60	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353C4D

Deuteranopia (green-blind)

#2E364C

Tritanopia (blue-blind)

#004142

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183d4c;
/* rgb */ color: rgb(24, 61, 76);
/* oklch */ color: oklch(34.0% 0.049 227.5);

Tailwind

colors: {
  custom: {
    50: '#5b727e',
    500: '#183d4c',
    950: '#000000',
  },
}

SCSS

$custom: #183d4c;
$custom-light: #5b727e;
$custom-dark: #000000;

JSON

{
  "hex": "#183d4c",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 76
  },
  "hsl": {
    "h": 197.308,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.34026,
    "c": 0.04944,
    "h": 227.5
  },
  "luminance": 0.04053
}

Semantic roles & 50–950 ramp

primary

#183D4C

secondary

#83513D

accent

#764CDB

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #183D4C

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

Preview Lab → · Contrast checker → · Palette generator →