#181F73#181F73

#181F73 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.1% C 0.141 H 270.8°. Best body text is #FFFFFF at 14.17:1 contrast (WCAG AA passes).

Color values

HEX	#181F73
RGB	rgb(24, 31, 115)
HSL	hsl(235, 65%, 27%)
HSV	hsv(235, 79%, 45%)
CMYK	cmyk(79.1%, 73%, 0%, 54.9%)
CIE-LAB	lab(17.51, 28.88, -48.79)
CIE-LCH	lch(17.51, 56.70, 300.63°)
OKLab	oklab(30.08% 0.0021 -0.1412)
OKLCH	oklch(30.08% 0.141 270.8)
XYZ	xyz(3.9601, 2.4115, 16.4731)
Luminance	0.0241 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F73 #736C18

analogous

#184C73 #181F73 #3F1873

triadic

#181F73 #73181F #1F7318

tetradic

#181F73 #73184C #736C18 #18733F

square

#181F73 #73184C #736C18 #18733F

split-complementary

#181F73 #733F18 #4C7318

monochromatic

#050719 #0D1140 #181F73 #232DA6 #313ED4

Accessibility & contrast

On white

14.17

#181F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#181F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F73

14.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F73	#FFFFFF	#000000	##FFFFFF
##181F73	1.00	14.17	1.48	14.17
#FFFFFF	14.17	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F76

Deuteranopia (green-blind)

#002771

Tritanopia (blue-blind)

#003646

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181f73;
/* rgb */ color: rgb(24, 31, 115);
/* oklch */ color: oklch(30.1% 0.141 270.8);

Tailwind

colors: {
  custom: {
    50: '#665b9c',
    500: '#181f73',
    950: '#000000',
  },
}

SCSS

$custom: #181f73;
$custom-light: #665b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#181f73",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 115
  },
  "hsl": {
    "h": 235.385,
    "s": 65.468,
    "l": 27.255
  },
  "oklch": {
    "l": 0.3008,
    "c": 0.14123,
    "h": 270.8
  },
  "luminance": 0.02412
}

Semantic roles & 50–950 ramp

primary

#181F73

secondary

#A8A03F

accent

#DB3FE8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #181F73

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

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