#181D78#181D78

#181D78 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.150 H 270.9°. Best body text is #FFFFFF at 14.13:1 contrast (WCAG AA passes).

Color values

HEX	#181D78
RGB	rgb(24, 29, 120)
HSL	hsl(237, 67%, 28%)
HSV	hsv(237, 80%, 47%)
CMYK	cmyk(80%, 75.8%, 0%, 52.9%)
CIE-LAB	lab(17.59, 32.05, -51.87)
CIE-LCH	lch(17.59, 60.98, 301.71°)
OKLab	oklab(30.3% 0.0024 -0.1502)
OKLCH	oklch(30.3% 0.15 270.9)
XYZ	xyz(4.2051, 2.4285, 18.0128)
Luminance	0.0243 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D78 #787318

analogous

#184D78 #181D78 #431878

triadic

#181D78 #78181D #1D7818

tetradic

#181D78 #78184D #787318 #187843

square

#181D78 #78184D #787318 #187843

split-complementary

#181D78 #784318 #4D7818

monochromatic

#05061A #0E1145 #181D78 #2229AB #343CD6

Accessibility & contrast

On white

14.13

#181D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#181D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D78

14.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D78	#FFFFFF	#000000	##FFFFFF
##181D78	1.00	14.13	1.49	14.13
#FFFFFF	14.13	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307B

Deuteranopia (green-blind)

#002676

Tritanopia (blue-blind)

#003748

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181d78;
/* rgb */ color: rgb(24, 29, 120);
/* oklch */ color: oklch(30.3% 0.150 270.9);

Tailwind

colors: {
  custom: {
    50: '#675aa0',
    500: '#181d78',
    950: '#000000',
  },
}

SCSS

$custom: #181d78;
$custom-light: #675aa0;
$custom-dark: #000000;

JSON

{
  "hex": "#181d78",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 120
  },
  "hsl": {
    "h": 236.875,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.303,
    "c": 0.15022,
    "h": 270.9
  },
  "luminance": 0.02429
}

Semantic roles & 50–950 ramp

primary

#181D78

secondary

#ADA73F

accent

#E13EEA

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #181D78

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

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