#283D81#283D81

#283D81 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.3% C 0.118 H 267.6°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#283D81
RGB	rgb(40, 61, 129)
HSL	hsl(226, 53%, 33%)
HSV	hsv(226, 69%, 51%)
CMYK	cmyk(69%, 52.7%, 0%, 49.4%)
CIE-LAB	lab(27.77, 15.85, -40.92)
CIE-LCH	lch(27.77, 43.88, 291.17°)
OKLab	oklab(38.31% -0.0048 -0.1174)
OKLCH	oklch(38.31% 0.118 267.6)
XYZ	xyz(6.5049, 5.3730, 21.4589)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D81 #816C28

analogous

#286981 #283D81 #3F2881

triadic

#283D81 #81283D #3D8128

tetradic

#283D81 #812869 #816C28 #28813F

square

#283D81 #812869 #816C28 #28813F

split-complementary

#283D81 #813F28 #698128

monochromatic

#0B1124 #1A2752 #283D81 #3653B0 #5873CB

Accessibility & contrast

On white

10.12

#283D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#283D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D81

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D81	#FFFFFF	#000000	##FFFFFF
##283D81	1.00	10.12	2.07	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154683

Deuteranopia (green-blind)

#003E80

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283d81;
/* rgb */ color: rgb(40, 61, 129);
/* oklch */ color: oklch(38.3% 0.118 267.6);

Tailwind

colors: {
  custom: {
    50: '#6d72a6',
    500: '#283d81',
    950: '#000000',
  },
}

SCSS

$custom: #283d81;
$custom-light: #6d72a6;
$custom-dark: #000000;

JSON

{
  "hex": "#283d81",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 129
  },
  "hsl": {
    "h": 225.843,
    "s": 52.663,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38313,
    "c": 0.11753,
    "h": 267.6
  },
  "luminance": 0.05374
}

Semantic roles & 50–950 ramp

primary

#283D81

secondary

#B09B54

accent

#BA4CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283D81

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

Preview Lab → · Contrast checker → · Palette generator →