#283C73#283C73

#283C73 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.098 H 266.6°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#283C73
RGB	rgb(40, 60, 115)
HSL	hsl(224, 48%, 30%)
HSV	hsv(224, 65%, 45%)
CMYK	cmyk(65.2%, 47.8%, 0%, 54.9%)
CIE-LAB	lab(26.51, 11.16, -34.14)
CIE-LCH	lch(26.51, 35.92, 288.11°)
OKLab	oklab(37.04% -0.0057 -0.0975)
OKLCH	oklch(37.04% 0.098 266.6)
XYZ	xyz(5.5844, 4.9201, 16.8717)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C73 #735F28

analogous

#286173 #283C73 #392873

triadic

#283C73 #73283C #3C7328

tetradic

#283C73 #732861 #735F28 #287339

square

#283C73 #732861 #735F28 #287339

split-complementary

#283C73 #733928 #617328

monochromatic

#080D18 #182446 #283C73 #3854A0 #5270C3

Accessibility & contrast

On white

10.58

#283C73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#283C73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C73

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C73	#FFFFFF	#000000	##FFFFFF
##283C73	1.00	10.58	1.98	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224275

Deuteranopia (green-blind)

#153C72

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283c73;
/* rgb */ color: rgb(40, 60, 115);
/* oklch */ color: oklch(37.0% 0.098 266.6);

Tailwind

colors: {
  custom: {
    50: '#6a719c',
    500: '#283c73',
    950: '#000000',
  },
}

SCSS

$custom: #283c73;
$custom-light: #6a719c;
$custom-dark: #000000;

JSON

{
  "hex": "#283c73",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 115
  },
  "hsl": {
    "h": 224,
    "s": 48.387,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37037,
    "c": 0.09766,
    "h": 266.6
  },
  "luminance": 0.04921
}

Semantic roles & 50–950 ramp

primary

#283C73

secondary

#A58F52

accent

#B450D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283C73

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

Preview Lab → · Contrast checker → · Palette generator →