#183E4A#183E4A

#183E4A is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.2% C 0.048 H 221.6°. Best body text is #FFFFFF at 11.50:1 contrast (WCAG AA passes).

Color values

HEX	#183E4A
RGB	rgb(24, 62, 74)
HSL	hsl(194, 51%, 19%)
HSV	hsv(194, 68%, 29%)
CMYK	cmyk(67.6%, 16.2%, 0%, 71%)
CIE-LAB	lab(24.11, -9.19, -11.35)
CIE-LCH	lch(24.11, 14.60, 230.99°)
OKLab	oklab(34.21% -0.0355 -0.0316)
OKLCH	oklch(34.21% 0.048 221.6)
XYZ	xyz(3.3349, 4.1335, 7.0993)
Luminance	0.0413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E4A #4A2418

analogous

#184A3D #183E4A #18254A

triadic

#183E4A #4A183E #3E4A18

tetradic

#183E4A #3D184A #4A2418 #254A18

square

#183E4A #3D184A #4A2418 #254A18

split-complementary

#183E4A #4A1825 #4A3D18

monochromatic

#071317 #09171C #183E4A #276578 #368BA6

Accessibility & contrast

On white

11.50

#183E4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183E4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E4A

11.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E4A	#FFFFFF	#000000	##FFFFFF
##183E4A	1.00	11.50	1.83	11.50
#FFFFFF	11.50	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373C4B

Deuteranopia (green-blind)

#30374A

Tritanopia (blue-blind)

#004242

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183e4a;
/* rgb */ color: rgb(24, 62, 74);
/* oklch */ color: oklch(34.2% 0.048 221.6);

Tailwind

colors: {
  custom: {
    50: '#5b737c',
    500: '#183e4a',
    950: '#000000',
  },
}

SCSS

$custom: #183e4a;
$custom-light: #5b737c;
$custom-dark: #000000;

JSON

{
  "hex": "#183e4a",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 74
  },
  "hsl": {
    "h": 194.4,
    "s": 51.02,
    "l": 19.216
  },
  "oklch": {
    "l": 0.34206,
    "c": 0.04754,
    "h": 221.6
  },
  "luminance": 0.04134
}

Semantic roles & 50–950 ramp

primary

#183E4A

secondary

#814D3D

accent

#6F4DDA

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #183E4A

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

Preview Lab → · Contrast checker → · Palette generator →