#181E57#181E57

#181E57 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.102 H 272.9°. Best body text is #FFFFFF at 15.42:1 contrast (WCAG AA passes).

Color values

HEX	#181E57
RGB	rgb(24, 30, 87)
HSL	hsl(234, 57%, 22%)
HSV	hsv(234, 72%, 34%)
CMYK	cmyk(72.4%, 65.5%, 0%, 65.9%)
CIE-LAB	lab(14.46, 18.60, -35.34)
CIE-LCH	lch(14.46, 39.93, 297.76°)
OKLab	oklab(27% 0.0052 -0.1018)
OKLCH	oklch(27% 0.102 272.9)
XYZ	xyz(2.5607, 1.8106, 9.2295)
Luminance	0.0181 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E57 #575118

analogous

#183E57 #181E57 #321857

triadic

#181E57 #57181E #1E5718

tetradic

#181E57 #57183E #575118 #185732

square

#181E57 #57183E #575118 #185732

split-complementary

#181E57 #573218 #3E5718

monochromatic

#070818 #0B0D27 #181E57 #252F87 #323FB7

Accessibility & contrast

On white

15.42

#181E57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181E57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E57

15.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E57	#FFFFFF	#000000	##FFFFFF
##181E57	1.00	15.42	1.36	15.42
#FFFFFF	15.42	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002759

Deuteranopia (green-blind)

#002256

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181e57;
/* rgb */ color: rgb(24, 30, 87);
/* oklch */ color: oklch(27.0% 0.102 272.9);

Tailwind

colors: {
  custom: {
    50: '#5e5987',
    500: '#181e57',
    950: '#000000',
  },
}

SCSS

$custom: #181e57;
$custom-light: #5e5987;
$custom-dark: #000000;

JSON

{
  "hex": "#181e57",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 87
  },
  "hsl": {
    "h": 234.286,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.26997,
    "c": 0.10198,
    "h": 272.9
  },
  "luminance": 0.01811
}

Semantic roles & 50–950 ramp

primary

#181E57

secondary

#8E863D

accent

#D248E0

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181E57

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

Preview Lab → · Contrast checker → · Palette generator →