#283DAD#283DAD

#283DAD is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.179 H 268.8°. Best body text is #FFFFFF at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#283DAD
RGB	rgb(40, 61, 173)
HSL	hsl(231, 62%, 42%)
HSV	hsv(231, 77%, 68%)
CMYK	cmyk(76.9%, 64.7%, 0%, 32.2%)
CIE-LAB	lab(31.36, 32.57, -61.96)
CIE-LCH	lch(31.36, 70.00, 297.73°)
OKLab	oklab(42.11% -0.0037 -0.1792)
OKLCH	oklch(42.11% 0.179 268.8)
XYZ	xyz(10.0840, 6.8046, 40.3090)
Luminance	0.0681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DAD #AD9828

analogous

#2880AD #283DAD #5628AD

triadic

#283DAD #AD283D #3DAD28

tetradic

#283DAD #AD2880 #AD9828 #28AD56

square

#283DAD #AD2880 #AD9828 #28AD56

split-complementary

#283DAD #AD5628 #80AD28

monochromatic

#111A4A #1D2B7B #283DAD #3F57D3 #7182DE

Accessibility & contrast

On white

8.89

#283DAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#283DAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DAD

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DAD	#FFFFFF	#000000	##FFFFFF
##283DAD	1.00	8.89	2.36	8.89
#FFFFFF	8.89	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B1

Deuteranopia (green-blind)

#0044AB

Tritanopia (blue-blind)

#005B6F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #283dad;
/* rgb */ color: rgb(40, 61, 173);
/* oklch */ color: oklch(42.1% 0.179 268.8);

Tailwind

colors: {
  custom: {
    50: '#7772c6',
    500: '#283dad',
    950: '#000000',
  },
}

SCSS

$custom: #283dad;
$custom-light: #7772c6;
$custom-dark: #000000;

JSON

{
  "hex": "#283dad",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 173
  },
  "hsl": {
    "h": 230.526,
    "s": 62.441,
    "l": 41.765
  },
  "oklch": {
    "l": 0.42109,
    "c": 0.17925,
    "h": 268.8
  },
  "luminance": 0.06806
}

Semantic roles & 50–950 ramp

primary

#283DAD

secondary

#C5B76C

accent

#CC42E6

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283DAD

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

Preview Lab → · Contrast checker → · Palette generator →