#284B99#284B99

#284B99 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.2% C 0.134 H 263.6°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#284B99
RGB	rgb(40, 75, 153)
HSL	hsl(221, 59%, 38%)
HSV	hsv(221, 74%, 60%)
CMYK	cmyk(73.9%, 51%, 0%, 40%)
CIE-LAB	lab(33.53, 15.59, -46.40)
CIE-LCH	lch(33.53, 48.95, 288.58°)
OKLab	oklab(43.23% -0.015 -0.1333)
OKLCH	oklch(43.23% 0.134 263.6)
XYZ	xyz(9.1389, 7.7822, 31.1513)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284B99 #997628

analogous

#288399 #284B99 #3E2899

triadic

#284B99 #99284B #4B9928

tetradic

#284B99 #992883 #997628 #28993E

square

#284B99 #992883 #997628 #28993E

split-complementary

#284B99 #993E28 #839928

monochromatic

#0F1B38 #1B3368 #284B99 #3563CA #6588D7

Accessibility & contrast

On white

8.21

#284B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#284B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284B99

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284B99	#FFFFFF	#000000	##FFFFFF
##284B99	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D549C

Deuteranopia (green-blind)

#004A97

Tritanopia (blue-blind)

#005E6A

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284b99;
/* rgb */ color: rgb(40, 75, 153);
/* oklch */ color: oklch(43.2% 0.134 263.6);

Tailwind

colors: {
  custom: {
    50: '#727cb8',
    500: '#284b99',
    950: '#000000',
  },
}

SCSS

$custom: #284b99;
$custom-light: #727cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#284b99",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 153
  },
  "hsl": {
    "h": 221.416,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.43233,
    "c": 0.13415,
    "h": 263.6
  },
  "luminance": 0.07783
}

Semantic roles & 50–950 ramp

primary

#284B99

secondary

#BDA060

accent

#B246E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #284B99

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

Preview Lab → · Contrast checker → · Palette generator →