#283591#283591

#283591 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.0% C 0.151 H 271.0°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#283591
RGB	rgb(40, 53, 145)
HSL	hsl(233, 57%, 36%)
HSV	hsv(233, 72%, 57%)
CMYK	cmyk(72.4%, 63.4%, 0%, 43.1%)
CIE-LAB	lab(26.85, 27.42, -52.35)
CIE-LCH	lch(26.85, 59.09, 297.64°)
OKLab	oklab(38.03% 0.0028 -0.1511)
OKLCH	oklch(38.03% 0.151 271)
XYZ	xyz(7.2573, 5.0409, 27.3731)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283591 #918428

analogous

#286A91 #283591 #502891

triadic

#283591 #912835 #359128

tetradic

#283591 #91286A #918428 #289150

square

#283591 #91286A #918428 #289150

split-complementary

#283591 #915028 #6A9128

monochromatic

#0E1231 #1B2361 #283591 #3547C1 #606ED3

Accessibility & contrast

On white

10.46

#283591 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283591 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283591

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283591	#FFFFFF	#000000	##FFFFFF
##283591	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004494

Deuteranopia (green-blind)

#003B8F

Tritanopia (blue-blind)

#004D5E

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283591;
/* rgb */ color: rgb(40, 53, 145);
/* oklch */ color: oklch(38.0% 0.151 271.0);

Tailwind

colors: {
  custom: {
    50: '#716cb2',
    500: '#283591',
    950: '#000000',
  },
}

SCSS

$custom: #283591;
$custom-light: #716cb2;
$custom-dark: #000000;

JSON

{
  "hex": "#283591",
  "rgb": {
    "r": 40,
    "g": 53,
    "b": 145
  },
  "hsl": {
    "h": 232.571,
    "s": 56.757,
    "l": 36.275
  },
  "oklch": {
    "l": 0.38025,
    "c": 0.15115,
    "h": 271
  },
  "luminance": 0.05042
}

Semantic roles & 50–950 ramp

primary

#283591

secondary

#B9AD5C

accent

#CD48E0

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283591

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

Preview Lab → · Contrast checker → · Palette generator →