#183381#183381

#183381 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.4% C 0.136 H 265.3°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#183381
RGB	rgb(24, 51, 129)
HSL	hsl(225, 69%, 30%)
HSV	hsv(225, 81%, 51%)
CMYK	cmyk(81.4%, 60.5%, 0%, 49.4%)
CIE-LAB	lab(24.15, 20.59, -46.83)
CIE-LCH	lch(24.15, 51.16, 293.74°)
OKLab	oklab(35.37% -0.0111 -0.1353)
OKLCH	oklch(35.37% 0.136 265.3)
XYZ	xyz(5.5216, 4.1462, 21.2739)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183381 #816618

analogous

#186881 #183381 #311881

triadic

#183381 #811833 #338118

tetradic

#183381 #811868 #816618 #188131

square

#183381 #811868 #816618 #188131

split-complementary

#183381 #813118 #688118

monochromatic

#050A1A #0E1F4D #183381 #2247B5 #3963DA

Accessibility & contrast

On white

11.48

#183381 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183381 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183381

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183381	#FFFFFF	#000000	##FFFFFF
##183381	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E84

Deuteranopia (green-blind)

#00357F

Tritanopia (blue-blind)

#004754

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183381;
/* rgb */ color: rgb(24, 51, 129);
/* oklch */ color: oklch(35.4% 0.136 265.3);

Tailwind

colors: {
  custom: {
    50: '#686aa6',
    500: '#183381',
    950: '#000000',
  },
}

SCSS

$custom: #183381;
$custom-light: #686aa6;
$custom-dark: #000000;

JSON

{
  "hex": "#183381",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 129
  },
  "hsl": {
    "h": 224.571,
    "s": 68.627,
    "l": 30
  },
  "oklch": {
    "l": 0.35373,
    "c": 0.13576,
    "h": 265.3
  },
  "luminance": 0.04147
}

Semantic roles & 50–950 ramp

primary

#183381

secondary

#B59740

accent

#BE3CEB

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #183381

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

Preview Lab → · Contrast checker → · Palette generator →