#181B78#181B78

#181B78 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.152 H 271.2°. Best body text is #FFFFFF at 14.32:1 contrast (WCAG AA passes).

Color values

HEX	#181B78
RGB	rgb(24, 27, 120)
HSL	hsl(238, 67%, 28%)
HSV	hsv(238, 80%, 47%)
CMYK	cmyk(80%, 77.5%, 0%, 52.9%)
CIE-LAB	lab(17.15, 33.29, -52.61)
CIE-LCH	lch(17.15, 62.25, 302.32°)
OKLab	oklab(29.98% 0.0033 -0.1523)
OKLCH	oklch(29.98% 0.152 271.2)
XYZ	xyz(4.1576, 2.3337, 17.9970)
Luminance	0.0233 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B78 #787518

analogous

#184B78 #181B78 #451878

triadic

#181B78 #78181B #1B7818

tetradic

#181B78 #78184B #787518 #187845

square

#181B78 #78184B #787518 #187845

split-complementary

#181B78 #784518 #4B7818

monochromatic

#05061A #0E1045 #181B78 #2226AB #3439D6

Accessibility & contrast

On white

14.32

#181B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#181B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B78

14.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B78	#FFFFFF	#000000	##FFFFFF
##181B78	1.00	14.32	1.47	14.32
#FFFFFF	14.32	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7B

Deuteranopia (green-blind)

#002576

Tritanopia (blue-blind)

#003648

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #181b78;
/* rgb */ color: rgb(24, 27, 120);
/* oklch */ color: oklch(30.0% 0.152 271.2);

Tailwind

colors: {
  custom: {
    50: '#6858a0',
    500: '#181b78',
    950: '#000000',
  },
}

SCSS

$custom: #181b78;
$custom-light: #6858a0;
$custom-dark: #000000;

JSON

{
  "hex": "#181b78",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 120
  },
  "hsl": {
    "h": 238.125,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.29984,
    "c": 0.15236,
    "h": 271.2
  },
  "luminance": 0.02334
}

Semantic roles & 50–950 ramp

primary

#181B78

secondary

#ADA93F

accent

#E43EEA

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #181B78

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

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