#283E8A#283E8A

#283E8A is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.129 H 267.8°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#283E8A
RGB	rgb(40, 62, 138)
HSL	hsl(227, 55%, 35%)
HSV	hsv(227, 71%, 54%)
CMYK	cmyk(71%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(28.72, 18.63, -44.98)
CIE-LCH	lch(28.72, 48.69, 292.50°)
OKLab	oklab(39.24% -0.0049 -0.1294)
OKLCH	oklch(39.24% 0.129 267.8)
XYZ	xyz(7.1836, 5.7306, 24.7674)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283E8A #8A7428

analogous

#286F8A #283E8A #43288A

triadic

#283E8A #8A283E #3E8A28

tetradic

#283E8A #8A286F #8A7428 #288A43

square

#283E8A #8A286F #8A7428 #288A43

split-complementary

#283E8A #8A4328 #6F8A28

monochromatic

#0C132B #1A295B #283E8A #3653B9 #5D76D0

Accessibility & contrast

On white

9.78

#283E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#283E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283E8A

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283E8A	#FFFFFF	#000000	##FFFFFF
##283E8A	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06488D

Deuteranopia (green-blind)

#003F88

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283e8a;
/* rgb */ color: rgb(40, 62, 138);
/* oklch */ color: oklch(39.2% 0.129 267.8);

Tailwind

colors: {
  custom: {
    50: '#6f72ad',
    500: '#283e8a',
    950: '#000000',
  },
}

SCSS

$custom: #283e8a;
$custom-light: #6f72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#283e8a",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 226.531,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39243,
    "c": 0.12945,
    "h": 267.8
  },
  "luminance": 0.05731
}

Semantic roles & 50–950 ramp

primary

#283E8A

secondary

#B5A059

accent

#BD49DE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283E8A

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

Preview Lab → · Contrast checker → · Palette generator →