#283588#283588

#283588 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.2% C 0.138 H 271.2°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#283588
RGB	rgb(40, 53, 136)
HSL	hsl(232, 55%, 35%)
HSV	hsv(232, 71%, 53%)
CMYK	cmyk(70.6%, 61%, 0%, 46.7%)
CIE-LAB	lab(26.08, 24.03, -48.03)
CIE-LCH	lch(26.08, 53.70, 296.58°)
OKLab	oklab(37.22% 0.0029 -0.1384)
OKLCH	oklch(37.22% 0.138 271.2)
XYZ	xyz(6.5906, 4.7743, 23.8620)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283588 #887B28

analogous

#286588 #283588 #4B2888

triadic

#283588 #882835 #358828

tetradic

#283588 #882865 #887B28 #28884B

square

#283588 #882865 #887B28 #28884B

split-complementary

#283588 #884B28 #658828

monochromatic

#0C1029 #1A2359 #283588 #3647B7 #5B6BCF

Accessibility & contrast

On white

10.74

#283588 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#283588 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283588

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283588	#FFFFFF	#000000	##FFFFFF
##283588	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428B

Deuteranopia (green-blind)

#003986

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283588;
/* rgb */ color: rgb(40, 53, 136);
/* oklch */ color: oklch(37.2% 0.138 271.2);

Tailwind

colors: {
  custom: {
    50: '#6f6cab',
    500: '#283588',
    950: '#000000',
  },
}

SCSS

$custom: #283588;
$custom-light: #6f6cab;
$custom-dark: #000000;

JSON

{
  "hex": "#283588",
  "rgb": {
    "r": 40,
    "g": 53,
    "b": 136
  },
  "hsl": {
    "h": 231.875,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.37216,
    "c": 0.13847,
    "h": 271.2
  },
  "luminance": 0.04775
}

Semantic roles & 50–950 ramp

primary

#283588

secondary

#B4A858

accent

#CA4ADE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #283588

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

Preview Lab → · Contrast checker → · Palette generator →