#283B73#283B73

#283B73 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.8% C 0.099 H 267.3°. Best body text is #FFFFFF at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#283B73
RGB	rgb(40, 59, 115)
HSL	hsl(225, 48%, 30%)
HSV	hsv(225, 65%, 45%)
CMYK	cmyk(65.2%, 48.7%, 0%, 54.9%)
CIE-LAB	lab(26.21, 11.86, -34.62)
CIE-LCH	lch(26.21, 36.59, 288.91°)
OKLab	oklab(36.81% -0.0046 -0.0989)
OKLCH	oklch(36.81% 0.099 267.3)
XYZ	xyz(5.5325, 4.8164, 16.8544)
Luminance	0.0482 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B73 #736028

analogous

#286073 #283B73 #3A2873

triadic

#283B73 #73283B #3B7328

tetradic

#283B73 #732860 #736028 #28733A

square

#283B73 #732860 #736028 #28733A

split-complementary

#283B73 #733A28 #607328

monochromatic

#080C18 #182446 #283B73 #3852A0 #526FC3

Accessibility & contrast

On white

10.70

#283B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#283B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B73

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B73	#FFFFFF	#000000	##FFFFFF
##283B73	1.00	10.70	1.96	10.70
#FFFFFF	10.70	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204275

Deuteranopia (green-blind)

#133B72

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283b73;
/* rgb */ color: rgb(40, 59, 115);
/* oklch */ color: oklch(36.8% 0.099 267.3);

Tailwind

colors: {
  custom: {
    50: '#6a709c',
    500: '#283b73',
    950: '#000000',
  },
}

SCSS

$custom: #283b73;
$custom-light: #6a709c;
$custom-dark: #000000;

JSON

{
  "hex": "#283b73",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 115
  },
  "hsl": {
    "h": 224.8,
    "s": 48.387,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36806,
    "c": 0.09903,
    "h": 267.3
  },
  "luminance": 0.04817
}

Semantic roles & 50–950 ramp

primary

#283B73

secondary

#A59052

accent

#B550D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283B73

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

Preview Lab → · Contrast checker → · Palette generator →