#283791#283791

#283791 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.4% C 0.149 H 270.5°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#283791
RGB	rgb(40, 55, 145)
HSL	hsl(231, 57%, 36%)
HSV	hsv(231, 72%, 57%)
CMYK	cmyk(72.4%, 62.1%, 0%, 43.1%)
CIE-LAB	lab(27.37, 26.07, -51.49)
CIE-LCH	lch(27.37, 57.72, 296.86°)
OKLab	oklab(38.41% 0.0012 -0.1486)
OKLCH	oklch(38.41% 0.149 270.5)
XYZ	xyz(7.3504, 5.2271, 27.4041)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283791 #918228

analogous

#286C91 #283791 #4E2891

triadic

#283791 #912837 #379128

tetradic

#283791 #91286C #918228 #28914E

square

#283791 #91286C #918228 #28914E

split-complementary

#283791 #914E28 #6C9128

monochromatic

#0E1331 #1B2561 #283791 #3549C1 #6071D3

Accessibility & contrast

On white

10.27

#283791 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283791 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283791

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283791	#FFFFFF	#000000	##FFFFFF
##283791	1.00	10.27	2.05	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004694

Deuteranopia (green-blind)

#003C8F

Tritanopia (blue-blind)

#004E5E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283791;
/* rgb */ color: rgb(40, 55, 145);
/* oklch */ color: oklch(38.4% 0.149 270.5);

Tailwind

colors: {
  custom: {
    50: '#716db2',
    500: '#283791',
    950: '#000000',
  },
}

SCSS

$custom: #283791;
$custom-light: #716db2;
$custom-dark: #000000;

JSON

{
  "hex": "#283791",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 145
  },
  "hsl": {
    "h": 231.429,
    "s": 56.757,
    "l": 36.275
  },
  "oklch": {
    "l": 0.3841,
    "c": 0.14861,
    "h": 270.5
  },
  "luminance": 0.05228
}

Semantic roles & 50–950 ramp

primary

#283791

secondary

#B9AB5C

accent

#CA48E0

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283791

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

Preview Lab → · Contrast checker → · Palette generator →