#283B83#283B83

#283B83 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.0% C 0.123 H 268.7°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#283B83
RGB	rgb(40, 59, 131)
HSL	hsl(227, 53%, 34%)
HSV	hsv(227, 69%, 51%)
CMYK	cmyk(69.5%, 55%, 0%, 48.6%)
CIE-LAB	lab(27.34, 18.00, -42.86)
CIE-LCH	lch(27.34, 46.49, 292.78°)
OKLab	oklab(38.04% -0.0027 -0.1232)
OKLCH	oklch(38.04% 0.123 268.7)
XYZ	xyz(6.5344, 5.2171, 22.1310)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B83 #837028

analogous

#286883 #283B83 #432883

triadic

#283B83 #83283B #3B8328

tetradic

#283B83 #832868 #837028 #288343

square

#283B83 #832868 #837028 #288343

split-complementary

#283B83 #834328 #688328

monochromatic

#0B1125 #1A2654 #283B83 #3650B2 #5971CC

Accessibility & contrast

On white

10.28

#283B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#283B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B83

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B83	#FFFFFF	#000000	##FFFFFF
##283B83	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#094586

Deuteranopia (green-blind)

#003D82

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283b83;
/* rgb */ color: rgb(40, 59, 131);
/* oklch */ color: oklch(38.0% 0.123 268.7);

Tailwind

colors: {
  custom: {
    50: '#6d70a8',
    500: '#283b83',
    950: '#000000',
  },
}

SCSS

$custom: #283b83;
$custom-light: #6d70a8;
$custom-dark: #000000;

JSON

{
  "hex": "#283b83",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 131
  },
  "hsl": {
    "h": 227.473,
    "s": 53.216,
    "l": 33.529
  },
  "oklch": {
    "l": 0.38036,
    "c": 0.1232,
    "h": 268.7
  },
  "luminance": 0.05218
}

Semantic roles & 50–950 ramp

primary

#283B83

secondary

#B19E55

accent

#BE4BDD

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #283B83

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

Preview Lab → · Contrast checker → · Palette generator →