#181F77#181F77

#181F77 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.5% C 0.147 H 270.6°. Best body text is #FFFFFF at 13.99:1 contrast (WCAG AA passes).

Color values

HEX	#181F77
RGB	rgb(24, 31, 119)
HSL	hsl(236, 66%, 28%)
HSV	hsv(236, 80%, 47%)
CMYK	cmyk(79.8%, 73.9%, 0%, 53.3%)
CIE-LAB	lab(17.94, 30.39, -50.65)
CIE-LCH	lch(17.94, 59.07, 300.97°)
OKLab	oklab(30.52% 0.0015 -0.1466)
OKLCH	oklch(30.52% 0.147 270.6)
XYZ	xyz(4.1953, 2.5056, 17.7117)
Luminance	0.0251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F77 #777018

analogous

#184E77 #181F77 #401877

triadic

#181F77 #77181F #1F7718

tetradic

#181F77 #77184E #777018 #187740

square

#181F77 #77184E #777018 #187740

split-complementary

#181F77 #774018 #4E7718

monochromatic

#050719 #0E1244 #181F77 #222CAA #333FD6

Accessibility & contrast

On white

13.99

#181F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#181F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F77

13.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F77	#FFFFFF	#000000	##FFFFFF
##181F77	1.00	13.99	1.50	13.99
#FFFFFF	13.99	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307A

Deuteranopia (green-blind)

#002775

Tritanopia (blue-blind)

#003848

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #181f77;
/* rgb */ color: rgb(24, 31, 119);
/* oklch */ color: oklch(30.5% 0.147 270.6);

Tailwind

colors: {
  custom: {
    50: '#675b9f',
    500: '#181f77',
    950: '#000000',
  },
}

SCSS

$custom: #181f77;
$custom-light: #675b9f;
$custom-dark: #000000;

JSON

{
  "hex": "#181f77",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 119
  },
  "hsl": {
    "h": 235.579,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.30519,
    "c": 0.14666,
    "h": 270.6
  },
  "luminance": 0.02506
}

Semantic roles & 50–950 ramp

primary

#181F77

secondary

#ACA43F

accent

#DD3EE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #181F77

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

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