#283C90#283C90

#283C90 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.3% C 0.141 H 268.8°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#283C90
RGB	rgb(40, 60, 144)
HSL	hsl(228, 57%, 36%)
HSV	hsv(228, 72%, 56%)
CMYK	cmyk(72.2%, 58.3%, 0%, 43.5%)
CIE-LAB	lab(28.63, 22.30, -48.83)
CIE-LCH	lch(28.63, 53.68, 294.55°)
OKLab	oklab(39.32% -0.0028 -0.1407)
OKLCH	oklch(39.32% 0.141 268.8)
XYZ	xyz(7.5232, 5.6957, 27.0830)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C90 #907C28

analogous

#287090 #283C90 #482890

triadic

#283C90 #90283C #3C9028

tetradic

#283C90 #902870 #907C28 #289048

square

#283C90 #902870 #907C28 #289048

split-complementary

#283C90 #904828 #709028

monochromatic

#0D1430 #1B2860 #283C90 #3550C0 #6076D3

Accessibility & contrast

On white

9.82

#283C90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#283C90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C90

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C90	#FFFFFF	#000000	##FFFFFF
##283C90	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003F8E

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283c90;
/* rgb */ color: rgb(40, 60, 144);
/* oklch */ color: oklch(39.3% 0.141 268.8);

Tailwind

colors: {
  custom: {
    50: '#7071b1',
    500: '#283c90',
    950: '#000000',
  },
}

SCSS

$custom: #283c90;
$custom-light: #7071b1;
$custom-dark: #000000;

JSON

{
  "hex": "#283c90",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 144
  },
  "hsl": {
    "h": 228.462,
    "s": 56.522,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39321,
    "c": 0.14074,
    "h": 268.8
  },
  "luminance": 0.05696
}

Semantic roles & 50–950 ramp

primary

#283C90

secondary

#B8A65C

accent

#C348E0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283C90

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

Preview Lab → · Contrast checker → · Palette generator →