#283A8F#283A8F

#283A8F is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.142 H 269.5°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#283A8F
RGB	rgb(40, 58, 143)
HSL	hsl(230, 56%, 36%)
HSV	hsv(230, 72%, 56%)
CMYK	cmyk(72%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(28.01, 23.28, -49.23)
CIE-LCH	lch(28.01, 54.46, 295.31°)
OKLab	oklab(38.83% -0.0012 -0.1419)
OKLCH	oklch(38.83% 0.142 269.5)
XYZ	xyz(7.3444, 5.4597, 26.6480)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A8F #8F7D28

analogous

#286D8F #283A8F #4A288F

triadic

#283A8F #8F283A #3A8F28

tetradic

#283A8F #8F286D #8F7D28 #288F4A

square

#283A8F #8F286D #8F7D28 #288F4A

split-complementary

#283A8F #8F4A28 #6D8F28

monochromatic

#0D132F #1B275F #283A8F #354DBF #5F73D2

Accessibility & contrast

On white

10.04

#283A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#283A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A8F

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A8F	#FFFFFF	#000000	##FFFFFF
##283A8F	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004792

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283a8f;
/* rgb */ color: rgb(40, 58, 143);
/* oklch */ color: oklch(38.8% 0.142 269.5);

Tailwind

colors: {
  custom: {
    50: '#706fb0',
    500: '#283a8f',
    950: '#000000',
  },
}

SCSS

$custom: #283a8f;
$custom-light: #706fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#283a8f",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 229.515,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.38829,
    "c": 0.14193,
    "h": 269.5
  },
  "luminance": 0.0546
}

Semantic roles & 50–950 ramp

primary

#283A8F

secondary

#B8A85B

accent

#C548E0

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283A8F

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

Preview Lab → · Contrast checker → · Palette generator →