#183E4B#183E4B

#183E4B is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.3% C 0.048 H 223.5°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#183E4B
RGB	rgb(24, 62, 75)
HSL	hsl(195, 52%, 19%)
HSV	hsv(195, 68%, 29%)
CMYK	cmyk(68%, 17.3%, 0%, 70.6%)
CIE-LAB	lab(24.15, -8.83, -11.94)
CIE-LCH	lch(24.15, 14.85, 233.53°)
OKLab	oklab(34.26% -0.0351 -0.0333)
OKLCH	oklch(34.26% 0.048 223.5)
XYZ	xyz(3.3688, 4.1471, 7.2782)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E4B #4B2518

analogous

#184B3F #183E4B #18254B

triadic

#183E4B #4B183E #3E4B18

tetradic

#183E4B #3F184B #4B2518 #254B18

square

#183E4B #3F184B #4B2518 #254B18

split-complementary

#183E4B #4B1825 #4B3F18

monochromatic

#071317 #09181D #183E4B #276479 #368BA8

Accessibility & contrast

On white

11.48

#183E4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183E4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E4B

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E4B	#FFFFFF	#000000	##FFFFFF
##183E4B	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373C4C

Deuteranopia (green-blind)

#2F374B

Tritanopia (blue-blind)

#004242

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183e4b;
/* rgb */ color: rgb(24, 62, 75);
/* oklch */ color: oklch(34.3% 0.048 223.5);

Tailwind

colors: {
  custom: {
    50: '#5b737d',
    500: '#183e4b',
    950: '#000000',
  },
}

SCSS

$custom: #183e4b;
$custom-light: #5b737d;
$custom-dark: #000000;

JSON

{
  "hex": "#183e4b",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 75
  },
  "hsl": {
    "h": 195.294,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.34255,
    "c": 0.04835,
    "h": 223.5
  },
  "luminance": 0.04147
}

Semantic roles & 50–950 ramp

primary

#183E4B

secondary

#824F3D

accent

#714DDB

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #183E4B

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

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