#181E81#181E81

#181E81 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.5% C 0.161 H 270.2°. Best body text is #FFFFFF at 13.62:1 contrast (WCAG AA passes).

Color values

HEX	#181E81
RGB	rgb(24, 30, 129)
HSL	hsl(237, 69%, 30%)
HSV	hsv(237, 81%, 51%)
CMYK	cmyk(81.4%, 76.7%, 0%, 49.4%)
CIE-LAB	lab(18.83, 34.71, -55.56)
CIE-LCH	lch(18.83, 65.51, 301.99°)
OKLab	oklab(31.48% 0.0005 -0.1609)
OKLCH	oklch(31.48% 0.161 270.2)
XYZ	xyz(4.8021, 2.7072, 21.0341)
Luminance	0.0271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E81 #817B18

analogous

#185381 #181E81 #461881

triadic

#181E81 #81181E #1E8118

tetradic

#181E81 #811853 #817B18 #188146

square

#181E81 #811853 #817B18 #188146

split-complementary

#181E81 #814618 #538118

monochromatic

#05061A #0E124D #181E81 #222AB5 #3942DA

Accessibility & contrast

On white

13.62

#181E81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#181E81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E81

13.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E81	#FFFFFF	#000000	##FFFFFF
##181E81	1.00	13.62	1.54	13.62
#FFFFFF	13.62	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003384

Deuteranopia (green-blind)

#00297F

Tritanopia (blue-blind)

#003B4E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #181e81;
/* rgb */ color: rgb(24, 30, 129);
/* oklch */ color: oklch(31.5% 0.161 270.2);

Tailwind

colors: {
  custom: {
    50: '#6a5ba7',
    500: '#181e81',
    950: '#000000',
  },
}

SCSS

$custom: #181e81;
$custom-light: #6a5ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#181e81",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 129
  },
  "hsl": {
    "h": 236.571,
    "s": 68.627,
    "l": 30
  },
  "oklch": {
    "l": 0.31484,
    "c": 0.16093,
    "h": 270.2
  },
  "luminance": 0.02708
}

Semantic roles & 50–950 ramp

primary

#181E81

secondary

#B5AE40

accent

#E13CEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080410

muted

#7A797F

Preview Lab

Preview with #181E81

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

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