#283C87#283C87

#283C87 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.128 H 268.5°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#283C87
RGB	rgb(40, 60, 135)
HSL	hsl(227, 54%, 34%)
HSV	hsv(227, 70%, 53%)
CMYK	cmyk(70.4%, 55.6%, 0%, 47.1%)
CIE-LAB	lab(27.93, 18.85, -44.40)
CIE-LCH	lch(27.93, 48.24, 293.00°)
OKLab	oklab(38.57% -0.0033 -0.1277)
OKLCH	oklch(38.57% 0.128 268.5)
XYZ	xyz(6.8626, 5.4314, 23.6037)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C87 #877328

analogous

#286C87 #283C87 #432887

triadic

#283C87 #87283C #3C8728

tetradic

#283C87 #87286C #877328 #288743

square

#283C87 #87286C #877328 #288743

split-complementary

#283C87 #874328 #6C8728

monochromatic

#0C1229 #1A2758 #283C87 #3651B6 #5B73CE

Accessibility & contrast

On white

10.07

#283C87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#283C87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C87

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C87	#FFFFFF	#000000	##FFFFFF
##283C87	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)

#04468A

Deuteranopia (green-blind)

#003E85

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283c87;
/* rgb */ color: rgb(40, 60, 135);
/* oklch */ color: oklch(38.6% 0.128 268.5);

Tailwind

colors: {
  custom: {
    50: '#6e71ab',
    500: '#283c87',
    950: '#000000',
  },
}

SCSS

$custom: #283c87;
$custom-light: #6e71ab;
$custom-dark: #000000;

JSON

{
  "hex": "#283c87",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 135
  },
  "hsl": {
    "h": 227.368,
    "s": 54.286,
    "l": 34.314
  },
  "oklch": {
    "l": 0.38574,
    "c": 0.12773,
    "h": 268.5
  },
  "luminance": 0.05432
}

Semantic roles & 50–950 ramp

primary

#283C87

secondary

#B4A057

accent

#BF4ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283C87

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

Preview Lab → · Contrast checker → · Palette generator →