#283F89#283F89

#283F89 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.4% C 0.127 H 267.3°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#283F89
RGB	rgb(40, 63, 137)
HSL	hsl(226, 55%, 35%)
HSV	hsv(226, 71%, 54%)
CMYK	cmyk(70.8%, 54%, 0%, 46.3%)
CIE-LAB	lab(28.93, 17.56, -44.02)
CIE-LCH	lch(28.93, 47.39, 291.74°)
OKLab	oklab(39.38% -0.0059 -0.1265)
OKLCH	oklch(39.38% 0.127 267.3)
XYZ	xyz(7.1664, 5.8116, 24.4061)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F89 #897228

analogous

#287089 #283F89 #422889

triadic

#283F89 #89283F #3F8928

tetradic

#283F89 #892870 #897228 #288942

square

#283F89 #892870 #897228 #288942

split-complementary

#283F89 #894228 #708928

monochromatic

#0C132A #1A295A #283F89 #3655B8 #5C77CF

Accessibility & contrast

On white

9.71

#283F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#283F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F89

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F89	#FFFFFF	#000000	##FFFFFF
##283F89	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E498C

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283f89;
/* rgb */ color: rgb(40, 63, 137);
/* oklch */ color: oklch(39.4% 0.127 267.3);

Tailwind

colors: {
  custom: {
    50: '#6f73ac',
    500: '#283f89',
    950: '#000000',
  },
}

SCSS

$custom: #283f89;
$custom-light: #6f73ac;
$custom-dark: #000000;

JSON

{
  "hex": "#283f89",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 137
  },
  "hsl": {
    "h": 225.773,
    "s": 54.802,
    "l": 34.706
  },
  "oklch": {
    "l": 0.39377,
    "c": 0.12667,
    "h": 267.3
  },
  "luminance": 0.05812
}

Semantic roles & 50–950 ramp

primary

#283F89

secondary

#B59F58

accent

#BB4ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283F89

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

Preview Lab → · Contrast checker → · Palette generator →