#283D83#283D83

#283D83 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.120 H 267.8°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#283D83
RGB	rgb(40, 61, 131)
HSL	hsl(226, 53%, 34%)
HSV	hsv(226, 69%, 51%)
CMYK	cmyk(69.5%, 53.4%, 0%, 48.6%)
CIE-LAB	lab(27.92, 16.62, -41.93)
CIE-LCH	lch(27.92, 45.11, 291.62°)
OKLab	oklab(38.47% -0.0046 -0.1204)
OKLCH	oklch(38.47% 0.121 267.8)
XYZ	xyz(6.6391, 5.4267, 22.1659)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D83 #836E28

analogous

#286A83 #283D83 #402883

triadic

#283D83 #83283D #3D8328

tetradic

#283D83 #83286A #836E28 #288340

square

#283D83 #83286A #836E28 #288340

split-complementary

#283D83 #834028 #6A8328

monochromatic

#0B1125 #1A2754 #283D83 #3653B2 #5974CC

Accessibility & contrast

On white

10.07

#283D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#283D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D83

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D83	#FFFFFF	#000000	##FFFFFF
##283D83	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124685

Deuteranopia (green-blind)

#003E82

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283d83;
/* rgb */ color: rgb(40, 61, 131);
/* oklch */ color: oklch(38.5% 0.120 267.8);

Tailwind

colors: {
  custom: {
    50: '#6d72a8',
    500: '#283d83',
    950: '#000000',
  },
}

SCSS

$custom: #283d83;
$custom-light: #6d72a8;
$custom-dark: #000000;

JSON

{
  "hex": "#283d83",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 131
  },
  "hsl": {
    "h": 226.154,
    "s": 53.216,
    "l": 33.529
  },
  "oklch": {
    "l": 0.38469,
    "c": 0.1205,
    "h": 267.8
  },
  "luminance": 0.05427
}

Semantic roles & 50–950 ramp

primary

#283D83

secondary

#B19C55

accent

#BB4BDD

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #283D83

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

Preview Lab → · Contrast checker → · Palette generator →