#181C57#181C57

#181C57 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.105 H 273.8°. Best body text is #FFFFFF at 15.64:1 contrast (WCAG AA passes).

Color values

HEX	#181C57
RGB	rgb(24, 28, 87)
HSL	hsl(236, 57%, 22%)
HSV	hsv(236, 72%, 34%)
CMYK	cmyk(72.4%, 67.8%, 0%, 65.9%)
CIE-LAB	lab(13.90, 20.05, -36.25)
CIE-LCH	lch(13.90, 41.43, 298.94°)
OKLab	oklab(26.58% 0.007 -0.1045)
OKLCH	oklch(26.58% 0.105 273.8)
XYZ	xyz(2.5117, 1.7126, 9.2132)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C57 #575318

analogous

#183C57 #181C57 #341857

triadic

#181C57 #57181C #1C5718

tetradic

#181C57 #57183C #575318 #185734

square

#181C57 #57183C #575318 #185734

split-complementary

#181C57 #573418 #3C5718

monochromatic

#070818 #0B0D27 #181C57 #252B87 #323BB7

Accessibility & contrast

On white

15.64

#181C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C57

15.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C57	#FFFFFF	#000000	##FFFFFF
##181C57	1.00	15.64	1.34	15.64
#FFFFFF	15.64	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002659

Deuteranopia (green-blind)

#002156

Tritanopia (blue-blind)

#002B36

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181c57;
/* rgb */ color: rgb(24, 28, 87);
/* oklch */ color: oklch(26.6% 0.105 273.8);

Tailwind

colors: {
  custom: {
    50: '#5e5887',
    500: '#181c57',
    950: '#000000',
  },
}

SCSS

$custom: #181c57;
$custom-light: #5e5887;
$custom-dark: #000000;

JSON

{
  "hex": "#181c57",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 87
  },
  "hsl": {
    "h": 236.19,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.26585,
    "c": 0.10478,
    "h": 273.8
  },
  "luminance": 0.01713
}

Semantic roles & 50–950 ramp

primary

#181C57

secondary

#8E893D

accent

#D648E0

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181C57

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

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