#181F78#181F78

#181F78 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.6% C 0.148 H 270.5°. Best body text is #FFFFFF at 13.94:1 contrast (WCAG AA passes).

Color values

HEX	#181F78
RGB	rgb(24, 31, 120)
HSL	hsl(236, 67%, 28%)
HSV	hsv(236, 80%, 47%)
CMYK	cmyk(80%, 74.2%, 0%, 52.9%)
CIE-LAB	lab(18.05, 30.77, -51.11)
CIE-LCH	lch(18.05, 59.66, 301.05°)
OKLab	oklab(30.63% 0.0014 -0.148)
OKLCH	oklch(30.63% 0.148 270.5)
XYZ	xyz(4.2557, 2.5298, 18.0297)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F78 #787118

analogous

#184F78 #181F78 #411878

triadic

#181F78 #78181F #1F7818

tetradic

#181F78 #78184F #787118 #187841

square

#181F78 #78184F #787118 #187841

split-complementary

#181F78 #784118 #4F7818

monochromatic

#05071A #0E1245 #181F78 #222CAB #3440D6

Accessibility & contrast

On white

13.94

#181F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#181F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F78

13.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F78	#FFFFFF	#000000	##FFFFFF
##181F78	1.00	13.94	1.51	13.94
#FFFFFF	13.94	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317B

Deuteranopia (green-blind)

#002776

Tritanopia (blue-blind)

#003849

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #181f78;
/* rgb */ color: rgb(24, 31, 120);
/* oklch */ color: oklch(30.6% 0.148 270.5);

Tailwind

colors: {
  custom: {
    50: '#675ba0',
    500: '#181f78',
    950: '#000000',
  },
}

SCSS

$custom: #181f78;
$custom-light: #675ba0;
$custom-dark: #000000;

JSON

{
  "hex": "#181f78",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 120
  },
  "hsl": {
    "h": 235.625,
    "s": 66.667,
    "l": 28.235
  },
  "oklch": {
    "l": 0.30629,
    "c": 0.14801,
    "h": 270.5
  },
  "luminance": 0.0253
}

Semantic roles & 50–950 ramp

primary

#181F78

secondary

#ADA53F

accent

#DD3EEA

background

#F6F5FA

surface

#EBE9F3

border

#C6C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #181F78

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

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