#283787#283787

#283787 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.134 H 270.5°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#283787
RGB	rgb(40, 55, 135)
HSL	hsl(231, 54%, 34%)
HSV	hsv(231, 70%, 53%)
CMYK	cmyk(70.4%, 59.3%, 0%, 47.1%)
CIE-LAB	lab(26.54, 22.28, -46.66)
CIE-LCH	lch(26.54, 51.71, 295.53°)
OKLab	oklab(37.53% 0.0012 -0.1344)
OKLCH	oklch(37.53% 0.134 270.5)
XYZ	xyz(6.6129, 4.9321, 23.5205)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283787 #877828

analogous

#286787 #283787 #492887

triadic

#283787 #872837 #378728

tetradic

#283787 #872867 #877828 #288749

square

#283787 #872867 #877828 #288749

split-complementary

#283787 #874928 #678728

monochromatic

#0C1129 #1A2458 #283787 #364AB6 #5B6DCE

Accessibility & contrast

On white

10.57

#283787 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#283787 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283787

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283787	#FFFFFF	#000000	##FFFFFF
##283787	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438A

Deuteranopia (green-blind)

#003B85

Tritanopia (blue-blind)

#004B59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283787;
/* rgb */ color: rgb(40, 55, 135);
/* oklch */ color: oklch(37.5% 0.134 270.5);

Tailwind

colors: {
  custom: {
    50: '#6f6dab',
    500: '#283787',
    950: '#000000',
  },
}

SCSS

$custom: #283787;
$custom-light: #6f6dab;
$custom-dark: #000000;

JSON

{
  "hex": "#283787",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 135
  },
  "hsl": {
    "h": 230.526,
    "s": 54.286,
    "l": 34.314
  },
  "oklch": {
    "l": 0.37531,
    "c": 0.1344,
    "h": 270.5
  },
  "luminance": 0.04933
}

Semantic roles & 50–950 ramp

primary

#283787

secondary

#B4A557

accent

#C64ADE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283787

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

Preview Lab → · Contrast checker → · Palette generator →