#183A66#183A66

#183A66 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.8% C 0.087 H 256.0°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#183A66
RGB	rgb(24, 58, 102)
HSL	hsl(214, 62%, 25%)
HSV	hsv(214, 76%, 40%)
CMYK	cmyk(76.5%, 43.1%, 0%, 60%)
CIE-LAB	lab(24.25, 4.47, -29.45)
CIE-LCH	lch(24.25, 29.79, 278.63°)
OKLab	oklab(34.81% -0.0209 -0.0841)
OKLCH	oklch(34.81% 0.087 256)
XYZ	xyz(4.2871, 4.1791, 13.1485)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A66 #664418

analogous

#186166 #183A66 #1D1866

triadic

#183A66 #66183A #3A6618

tetradic

#183A66 #661861 #664418 #18661D

square

#183A66 #661861 #664418 #18661D

split-complementary

#183A66 #661D18 #616618

monochromatic

#060E19 #0C1E34 #183A66 #245698 #2F72C9

Accessibility & contrast

On white

11.44

#183A66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183A66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A66

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A66	#FFFFFF	#000000	##FFFFFF
##183A66	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#253E68

Deuteranopia (green-blind)

#193665

Tritanopia (blue-blind)

#00444B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183a66;
/* rgb */ color: rgb(24, 58, 102);
/* oklch */ color: oklch(34.8% 0.087 256.0);

Tailwind

colors: {
  custom: {
    50: '#606f92',
    500: '#183a66',
    950: '#000000',
  },
}

SCSS

$custom: #183a66;
$custom-light: #606f92;
$custom-dark: #000000;

JSON

{
  "hex": "#183a66",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 102
  },
  "hsl": {
    "h": 213.846,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34813,
    "c": 0.08662,
    "h": 256
  },
  "luminance": 0.0418
}

Semantic roles & 50–950 ramp

primary

#183A66

secondary

#9C733E

accent

#9E43E5

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05070D

muted

#7A7A7E

Preview Lab

Preview with #183A66

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

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