#283381#283381

#283381 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.2% C 0.131 H 272.0°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#283381
RGB	rgb(40, 51, 129)
HSL	hsl(233, 53%, 33%)
HSV	hsv(233, 69%, 51%)
CMYK	cmyk(69%, 60.5%, 0%, 49.4%)
CIE-LAB	lab(24.96, 22.75, -45.47)
CIE-LCH	lch(24.96, 50.84, 296.58°)
OKLab	oklab(36.2% 0.0046 -0.131)
OKLCH	oklch(36.2% 0.131 272)
XYZ	xyz(6.0200, 4.4032, 21.2973)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283381 #817628

analogous

#285F81 #283381 #492881

triadic

#283381 #812833 #338128

tetradic

#283381 #81285F #817628 #288149

square

#283381 #81285F #817628 #288149

split-complementary

#283381 #814928 #5F8128

monochromatic

#0B0E24 #1A2152 #283381 #3645B0 #5866CB

Accessibility & contrast

On white

11.17

#283381 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#283381 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283381

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283381	#FFFFFF	#000000	##FFFFFF
##283381	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F84

Deuteranopia (green-blind)

#00377F

Tritanopia (blue-blind)

#004654

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283381;
/* rgb */ color: rgb(40, 51, 129);
/* oklch */ color: oklch(36.2% 0.131 272.0);

Tailwind

colors: {
  custom: {
    50: '#6e6aa6',
    500: '#283381',
    950: '#000000',
  },
}

SCSS

$custom: #283381;
$custom-light: #6e6aa6;
$custom-dark: #000000;

JSON

{
  "hex": "#283381",
  "rgb": {
    "r": 40,
    "g": 51,
    "b": 129
  },
  "hsl": {
    "h": 232.584,
    "s": 52.663,
    "l": 33.137
  },
  "oklch": {
    "l": 0.36202,
    "c": 0.13104,
    "h": 272
  },
  "luminance": 0.04404
}

Semantic roles & 50–950 ramp

primary

#283381

secondary

#B0A554

accent

#CA4CDC

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #283381

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

Preview Lab → · Contrast checker → · Palette generator →