#283F88#283F88

#283F88 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.3% C 0.125 H 267.2°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#283F88
RGB	rgb(40, 63, 136)
HSL	hsl(226, 55%, 35%)
HSV	hsv(226, 71%, 53%)
CMYK	cmyk(70.6%, 53.7%, 0%, 46.7%)
CIE-LAB	lab(28.86, 17.17, -43.52)
CIE-LCH	lch(28.86, 46.79, 291.53°)
OKLab	oklab(39.3% -0.006 -0.125)
OKLCH	oklch(39.3% 0.125 267.2)
XYZ	xyz(7.0950, 5.7830, 24.0301)
Luminance	0.0578 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F88 #887128

analogous

#286F88 #283F88 #412888

triadic

#283F88 #88283F #3F8828

tetradic

#283F88 #88286F #887128 #288841

square

#283F88 #88286F #887128 #288841

split-complementary

#283F88 #884128 #6F8828

monochromatic

#0C1329 #1A2959 #283F88 #3655B7 #5B77CF

Accessibility & contrast

On white

9.74

#283F88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#283F88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F88

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F88	#FFFFFF	#000000	##FFFFFF
##283F88	1.00	9.74	2.16	9.74
#FFFFFF	9.74	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#10498B

Deuteranopia (green-blind)

#004087

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283f88;
/* rgb */ color: rgb(40, 63, 136);
/* oklch */ color: oklch(39.3% 0.125 267.2);

Tailwind

colors: {
  custom: {
    50: '#6e73ab',
    500: '#283f88',
    950: '#000000',
  },
}

SCSS

$custom: #283f88;
$custom-light: #6e73ab;
$custom-dark: #000000;

JSON

{
  "hex": "#283f88",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 136
  },
  "hsl": {
    "h": 225.625,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.39298,
    "c": 0.1252,
    "h": 267.2
  },
  "luminance": 0.05784
}

Semantic roles & 50–950 ramp

primary

#283F88

secondary

#B49E58

accent

#BA4ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283F88

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

Preview Lab → · Contrast checker → · Palette generator →