#183E58#183E58

#183E58 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.0% C 0.063 H 241.6°. Best body text is #FFFFFF at 11.24:1 contrast (WCAG AA passes).

Color values

HEX	#183E58
RGB	rgb(24, 62, 88)
HSL	hsl(204, 57%, 22%)
HSV	hsv(204, 73%, 35%)
CMYK	cmyk(72.7%, 29.5%, 0%, 65.5%)
CIE-LAB	lab(24.78, -3.89, -19.53)
CIE-LCH	lch(24.78, 19.91, 258.72°)
OKLab	oklab(34.96% -0.0297 -0.055)
OKLCH	oklch(34.96% 0.063 241.6)
XYZ	xyz(3.8601, 4.3436, 9.8656)
Luminance	0.0434 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E58 #583218

analogous

#185852 #183E58 #181E58

triadic

#183E58 #58183E #3E5818

tetradic

#183E58 #521858 #583218 #1E5818

square

#183E58 #521858 #583218 #1E5818

split-complementary

#183E58 #58181E #585218

monochromatic

#071118 #0B1C28 #183E58 #256088 #3282B8

Accessibility & contrast

On white

11.24

#183E58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#183E58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E58

11.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E58	#FFFFFF	#000000	##FFFFFF
##183E58	1.00	11.24	1.87	11.24
#FFFFFF	11.24	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323E59

Deuteranopia (green-blind)

#293858

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183e58;
/* rgb */ color: rgb(24, 62, 88);
/* oklch */ color: oklch(35.0% 0.063 241.6);

Tailwind

colors: {
  custom: {
    50: '#5d7387',
    500: '#183e58',
    950: '#000000',
  },
}

SCSS

$custom: #183e58;
$custom-light: #5d7387;
$custom-dark: #000000;

JSON

{
  "hex": "#183e58",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 88
  },
  "hsl": {
    "h": 204.375,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.34958,
    "c": 0.06254,
    "h": 241.6
  },
  "luminance": 0.04344
}

Semantic roles & 50–950 ramp

primary

#183E58

secondary

#8F5E3D

accent

#8647E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #183E58

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

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