#283CAD#283CAD

#283CAD is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.180 H 269.0°. Best body text is #FFFFFF at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#283CAD
RGB	rgb(40, 60, 173)
HSL	hsl(231, 62%, 42%)
HSV	hsv(231, 77%, 68%)
CMYK	cmyk(76.9%, 65.3%, 0%, 32.2%)
CIE-LAB	lab(31.11, 33.22, -62.36)
CIE-LCH	lch(31.11, 70.66, 298.05°)
OKLab	oklab(41.93% -0.0031 -0.1804)
OKLCH	oklch(41.93% 0.18 269)
XYZ	xyz(10.0312, 6.6989, 40.2914)
Luminance	0.0670 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283CAD #AD9928

analogous

#287FAD #283CAD #5628AD

triadic

#283CAD #AD283C #3CAD28

tetradic

#283CAD #AD287F #AD9928 #28AD56

square

#283CAD #AD287F #AD9928 #28AD56

split-complementary

#283CAD #AD5628 #7FAD28

monochromatic

#111A4A #1D2B7B #283CAD #3F56D3 #7182DE

Accessibility & contrast

On white

8.97

#283CAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#283CAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283CAD

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283CAD	#FFFFFF	#000000	##FFFFFF
##283CAD	1.00	8.97	2.34	8.97
#FFFFFF	8.97	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B1

Deuteranopia (green-blind)

#0043AB

Tritanopia (blue-blind)

#005A6F

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283cad;
/* rgb */ color: rgb(40, 60, 173);
/* oklch */ color: oklch(41.9% 0.180 269.0);

Tailwind

colors: {
  custom: {
    50: '#7771c6',
    500: '#283cad',
    950: '#000000',
  },
}

SCSS

$custom: #283cad;
$custom-light: #7771c6;
$custom-dark: #000000;

JSON

{
  "hex": "#283cad",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 173
  },
  "hsl": {
    "h": 230.977,
    "s": 62.441,
    "l": 41.765
  },
  "oklch": {
    "l": 0.41928,
    "c": 0.18043,
    "h": 269
  },
  "luminance": 0.067
}

Semantic roles & 50–950 ramp

primary

#283CAD

secondary

#C5B86C

accent

#CD42E6

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #283CAD

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

Preview Lab → · Contrast checker → · Palette generator →