#181C78#181C78

#181C78 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.1% C 0.151 H 271.1°. Best body text is #FFFFFF at 14.23:1 contrast (WCAG AA passes).

Color values

HEX	#181C78
RGB	rgb(24, 28, 120)
HSL	hsl(238, 67%, 28%)
HSV	hsv(238, 80%, 47%)
CMYK	cmyk(80%, 76.7%, 0%, 52.9%)
CIE-LAB	lab(17.37, 32.67, -52.24)
CIE-LCH	lch(17.37, 61.62, 302.02°)
OKLab	oklab(30.14% 0.0028 -0.1513)
OKLCH	oklch(30.14% 0.151 271.1)
XYZ	xyz(4.1810, 2.3803, 18.0048)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C78 #787418

analogous

#184C78 #181C78 #441878

triadic

#181C78 #78181C #1C7818

tetradic

#181C78 #78184C #787418 #187844

square

#181C78 #78184C #787418 #187844

split-complementary

#181C78 #784418 #4C7818

monochromatic

#05061A #0E1045 #181C78 #2228AB #343BD6

Accessibility & contrast

On white

14.23

#181C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#181C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C78

14.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C78	#FFFFFF	#000000	##FFFFFF
##181C78	1.00	14.23	1.48	14.23
#FFFFFF	14.23	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7B

Deuteranopia (green-blind)

#002676

Tritanopia (blue-blind)

#003748

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181c78;
/* rgb */ color: rgb(24, 28, 120);
/* oklch */ color: oklch(30.1% 0.151 271.1);

Tailwind

colors: {
  custom: {
    50: '#6759a0',
    500: '#181c78',
    950: '#000000',
  },
}

SCSS

$custom: #181c78;
$custom-light: #6759a0;
$custom-dark: #000000;

JSON

{
  "hex": "#181c78",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 120
  },
  "hsl": {
    "h": 237.5,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.3014,
    "c": 0.1513,
    "h": 271.1
  },
  "luminance": 0.02381
}

Semantic roles & 50–950 ramp

primary

#181C78

secondary

#ADA83F

accent

#E23EEA

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #181C78

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

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