#283B84#283B84

#283B84 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.1% C 0.125 H 268.8°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#283B84
RGB	rgb(40, 59, 132)
HSL	hsl(228, 53%, 34%)
HSV	hsv(228, 70%, 52%)
CMYK	cmyk(69.7%, 55.3%, 0%, 48.2%)
CIE-LAB	lab(27.42, 18.38, -43.36)
CIE-LCH	lch(27.42, 47.10, 292.97°)
OKLab	oklab(38.12% -0.0026 -0.1246)
OKLCH	oklch(38.12% 0.125 268.8)
XYZ	xyz(6.6025, 5.2444, 22.4896)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B84 #847128

analogous

#286984 #283B84 #432884

triadic

#283B84 #84283B #3B8428

tetradic

#283B84 #842869 #847128 #288443

square

#283B84 #842869 #847128 #288443

split-complementary

#283B84 #844328 #698428

monochromatic

#0C1126 #1A2655 #283B84 #3650B3 #5A71CD

Accessibility & contrast

On white

10.25

#283B84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283B84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B84

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B84	#FFFFFF	#000000	##FFFFFF
##283B84	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#074587

Deuteranopia (green-blind)

#003D83

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283b84;
/* rgb */ color: rgb(40, 59, 132);
/* oklch */ color: oklch(38.1% 0.125 268.8);

Tailwind

colors: {
  custom: {
    50: '#6e70a8',
    500: '#283b84',
    950: '#000000',
  },
}

SCSS

$custom: #283b84;
$custom-light: #6e70a8;
$custom-dark: #000000;

JSON

{
  "hex": "#283b84",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 132
  },
  "hsl": {
    "h": 227.609,
    "s": 53.488,
    "l": 33.725
  },
  "oklch": {
    "l": 0.38117,
    "c": 0.12468,
    "h": 268.8
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary

#283B84

secondary

#B29F56

accent

#BF4BDD

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283B84

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

Preview Lab → · Contrast checker → · Palette generator →