#181F8F#181F8F

#181F8F is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.3% C 0.178 H 269.3°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#181F8F
RGB	rgb(24, 31, 143)
HSL	hsl(236, 71%, 33%)
HSV	hsv(236, 83%, 56%)
CMYK	cmyk(83.2%, 78.3%, 0%, 43.9%)
CIE-LAB	lab(20.66, 39.09, -61.32)
CIE-LCH	lch(20.66, 72.72, 302.51°)
OKLab	oklab(33.26% -0.0022 -0.1777)
OKLCH	oklch(33.26% 0.178 269.3)
XYZ	xyz(5.8229, 3.1566, 26.2837)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F8F #8F8818

analogous

#185A8F #181F8F #4D188F

triadic

#181F8F #8F181F #1F8F18

tetradic

#181F8F #8F185A #8F8818 #188F4D

square

#181F8F #8F185A #8F8818 #188F4D

split-complementary

#181F8F #8F4D18 #5A8F18

monochromatic

#060826 #0F145B #181F8F #212AC3 #424BDF

Accessibility & contrast

On white

12.87

#181F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#181F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F8F

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F8F	#FFFFFF	#000000	##FFFFFF
##181F8F	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003892

Deuteranopia (green-blind)

#002C8D

Tritanopia (blue-blind)

#004156

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #181f8f;
/* rgb */ color: rgb(24, 31, 143);
/* oklch */ color: oklch(33.3% 0.178 269.3);

Tailwind

colors: {
  custom: {
    50: '#6e5cb1',
    500: '#181f8f',
    950: '#000000',
  },
}

SCSS

$custom: #181f8f;
$custom-light: #6e5cb1;
$custom-dark: #000000;

JSON

{
  "hex": "#181f8f",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 143
  },
  "hsl": {
    "h": 236.471,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33257,
    "c": 0.17767,
    "h": 269.3
  },
  "luminance": 0.03157
}

Semantic roles & 50–950 ramp

primary

#181F8F

secondary

#C0B943

accent

#E33AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #181F8F

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

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