#181C79#181C79

#181C79 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.153 H 271.0°. Best body text is #FFFFFF at 14.18:1 contrast (WCAG AA passes).

Color values

HEX	#181C79
RGB	rgb(24, 28, 121)
HSL	hsl(238, 67%, 28%)
HSV	hsv(238, 80%, 47%)
CMYK	cmyk(80.2%, 76.9%, 0%, 52.5%)
CIE-LAB	lab(17.48, 33.04, -52.70)
CIE-LCH	lch(17.48, 62.20, 302.08°)
OKLab	oklab(30.26% 0.0027 -0.1526)
OKLCH	oklch(30.26% 0.153 271)
XYZ	xyz(4.2420, 2.4047, 18.3260)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C79 #797518

analogous

#184C79 #181C79 #441879

triadic

#181C79 #79181C #1C7918

tetradic

#181C79 #79184C #797518 #187944

square

#181C79 #79184C #797518 #187944

split-complementary

#181C79 #794418 #4C7918

monochromatic

#05061A #0E1046 #181C79 #2228AC #353BD7

Accessibility & contrast

On white

14.18

#181C79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#181C79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C79

14.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C79	#FFFFFF	#000000	##FFFFFF
##181C79	1.00	14.18	1.48	14.18
#FFFFFF	14.18	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307C

Deuteranopia (green-blind)

#002677

Tritanopia (blue-blind)

#003749

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181c79;
/* rgb */ color: rgb(24, 28, 121);
/* oklch */ color: oklch(30.3% 0.153 271.0);

Tailwind

colors: {
  custom: {
    50: '#6859a1',
    500: '#181c79',
    950: '#000000',
  },
}

SCSS

$custom: #181c79;
$custom-light: #6859a1;
$custom-dark: #000000;

JSON

{
  "hex": "#181c79",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 121
  },
  "hsl": {
    "h": 237.526,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.30255,
    "c": 0.15261,
    "h": 271
  },
  "luminance": 0.02405
}

Semantic roles & 50–950 ramp

primary

#181C79

secondary

#AEA93F

accent

#E33EEA

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #181C79

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

Preview Lab → · Contrast checker → · Palette generator →