#283D89#283D89

#283D89 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.129 H 268.2°. Best body text is #FFFFFF at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#283D89
RGB	rgb(40, 61, 137)
HSL	hsl(227, 55%, 35%)
HSV	hsv(227, 71%, 54%)
CMYK	cmyk(70.8%, 55.5%, 0%, 46.3%)
CIE-LAB	lab(28.36, 18.93, -44.94)
CIE-LCH	lch(28.36, 48.76, 292.84°)
OKLab	oklab(38.95% -0.0041 -0.1293)
OKLCH	oklch(38.95% 0.129 268.2)
XYZ	xyz(7.0576, 5.5941, 24.3699)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D89 #897428

analogous

#286E89 #283D89 #432889

triadic

#283D89 #89283D #3D8928

tetradic

#283D89 #89286E #897428 #288943

square

#283D89 #89286E #897428 #288943

split-complementary

#283D89 #894328 #6E8928

monochromatic

#0C132A #1A285A #283D89 #3652B8 #5C75CF

Accessibility & contrast

On white

9.91

#283D89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#283D89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D89

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D89	#FFFFFF	#000000	##FFFFFF
##283D89	1.00	9.91	2.12	9.91
#FFFFFF	9.91	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04488C

Deuteranopia (green-blind)

#003F87

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283d89;
/* rgb */ color: rgb(40, 61, 137);
/* oklch */ color: oklch(38.9% 0.129 268.2);

Tailwind

colors: {
  custom: {
    50: '#6f72ac',
    500: '#283d89',
    950: '#000000',
  },
}

SCSS

$custom: #283d89;
$custom-light: #6f72ac;
$custom-dark: #000000;

JSON

{
  "hex": "#283d89",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 137
  },
  "hsl": {
    "h": 227.01,
    "s": 54.802,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38949,
    "c": 0.12932,
    "h": 268.2
  },
  "luminance": 0.05595
}

Semantic roles & 50–950 ramp

primary

#283D89

secondary

#B5A158

accent

#BE4ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283D89

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

Preview Lab → · Contrast checker → · Palette generator →