#181781#181781

#181781 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.5% C 0.168 H 271.0°. Best body text is #FFFFFF at 14.20:1 contrast (WCAG AA passes).

Color values

HEX	#181781
RGB	rgb(24, 23, 129)
HSL	hsl(241, 70%, 30%)
HSV	hsv(241, 82%, 51%)
CMYK	cmyk(81.4%, 82.2%, 0%, 49.4%)
CIE-LAB	lab(17.42, 38.74, -57.90)
CIE-LCH	lch(17.42, 69.66, 303.79°)
OKLab	oklab(30.49% 0.0029 -0.1676)
OKLCH	oklch(30.49% 0.168 271)
XYZ	xyz(4.6442, 2.3914, 20.9814)
Luminance	0.0239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181781 #808117

analogous

#174B81 #181781 #4D1781

triadic

#181781 #811817 #178118

tetradic

#181781 #81174B #808117 #17814D

square

#181781 #81174B #808117 #17814D

split-complementary

#181781 #814D17 #4B8117

monochromatic

#05051A #0E0E4D #181781 #2220B5 #3937DB

Accessibility & contrast

On white

14.20

#181781 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#181781 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181781

14.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181781	#FFFFFF	#000000	##FFFFFF
##181781	1.00	14.20	1.48	14.20
#FFFFFF	14.20	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003084

Deuteranopia (green-blind)

#00257F

Tritanopia (blue-blind)

#00384C

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181781;
/* rgb */ color: rgb(24, 23, 129);
/* oklch */ color: oklch(30.5% 0.168 271.0);

Tailwind

colors: {
  custom: {
    50: '#6a57a7',
    500: '#181781',
    950: '#000000',
  },
}

SCSS

$custom: #181781;
$custom-light: #6a57a7;
$custom-dark: #000000;

JSON

{
  "hex": "#181781",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 129
  },
  "hsl": {
    "h": 240.566,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.3049,
    "c": 0.16764,
    "h": 271
  },
  "luminance": 0.02392
}

Semantic roles & 50–950 ramp

primary

#181781

secondary

#B4B53E

accent

#ED3BEB

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #181781

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

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