#181A81#181A81

#181A81 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.9% C 0.165 H 270.7°. Best body text is #FFFFFF at 13.97:1 contrast (WCAG AA passes).

Color values

HEX	#181A81
RGB	rgb(24, 26, 129)
HSL	hsl(239, 69%, 30%)
HSV	hsv(239, 81%, 51%)
CMYK	cmyk(81.4%, 79.8%, 0%, 49.4%)
CIE-LAB	lab(18.00, 37.08, -56.94)
CIE-LCH	lch(18.00, 67.95, 303.07°)
OKLab	oklab(30.89% 0.0019 -0.1649)
OKLCH	oklch(30.89% 0.165 270.7)
XYZ	xyz(4.7072, 2.5174, 21.0024)
Luminance	0.0252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A81 #817F18

analogous

#184F81 #181A81 #4A1881

triadic

#181A81 #81181A #1A8118

tetradic

#181A81 #81184F #817F18 #18814A

square

#181A81 #81184F #817F18 #18814A

split-complementary

#181A81 #814A18 #4F8118

monochromatic

#05051A #0E104D #181A81 #2224B5 #393CDA

Accessibility & contrast

On white

13.97

#181A81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#181A81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A81

13.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A81	#FFFFFF	#000000	##FFFFFF
##181A81	1.00	13.97	1.50	13.97
#FFFFFF	13.97	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003184

Deuteranopia (green-blind)

#00277F

Tritanopia (blue-blind)

#00394D

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #181a81;
/* rgb */ color: rgb(24, 26, 129);
/* oklch */ color: oklch(30.9% 0.165 270.7);

Tailwind

colors: {
  custom: {
    50: '#6a58a7',
    500: '#181a81',
    950: '#000000',
  },
}

SCSS

$custom: #181a81;
$custom-light: #6a58a7;
$custom-dark: #000000;

JSON

{
  "hex": "#181a81",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 129
  },
  "hsl": {
    "h": 238.857,
    "s": 68.627,
    "l": 30
  },
  "oklch": {
    "l": 0.30894,
    "c": 0.1649,
    "h": 270.7
  },
  "luminance": 0.02518
}

Semantic roles & 50–950 ramp

primary

#181A81

secondary

#B5B340

accent

#E83CEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080310

muted

#7A787F

Preview Lab

Preview with #181A81

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

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