#283D73#283D73

#283D73 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.096 H 265.9°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#283D73
RGB	rgb(40, 61, 115)
HSL	hsl(223, 48%, 30%)
HSV	hsv(223, 65%, 45%)
CMYK	cmyk(65.2%, 47%, 0%, 54.9%)
CIE-LAB	lab(26.81, 10.47, -33.65)
CIE-LCH	lch(26.81, 35.24, 287.28°)
OKLab	oklab(37.27% -0.0069 -0.0961)
OKLCH	oklch(37.27% 0.096 265.9)
XYZ	xyz(5.6373, 5.0259, 16.8894)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D73 #735E28

analogous

#286273 #283D73 #382873

triadic

#283D73 #73283D #3D7328

tetradic

#283D73 #732862 #735E28 #287338

square

#283D73 #732862 #735E28 #287338

split-complementary

#283D73 #733828 #627328

monochromatic

#080D18 #182546 #283D73 #3855A0 #5272C3

Accessibility & contrast

On white

10.47

#283D73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283D73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D73

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D73	#FFFFFF	#000000	##FFFFFF
##283D73	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244375

Deuteranopia (green-blind)

#183C72

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283d73;
/* rgb */ color: rgb(40, 61, 115);
/* oklch */ color: oklch(37.3% 0.096 265.9);

Tailwind

colors: {
  custom: {
    50: '#6a729c',
    500: '#283d73',
    950: '#000000',
  },
}

SCSS

$custom: #283d73;
$custom-light: #6a729c;
$custom-dark: #000000;

JSON

{
  "hex": "#283d73",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 115
  },
  "hsl": {
    "h": 223.2,
    "s": 48.387,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37268,
    "c": 0.0963,
    "h": 265.9
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#283D73

secondary

#A58E52

accent

#B250D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283D73

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

Preview Lab → · Contrast checker → · Palette generator →