#284C99#284C99

#284C99 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.5% C 0.133 H 263.1°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#284C99
RGB	rgb(40, 76, 153)
HSL	hsl(221, 59%, 38%)
HSV	hsv(221, 74%, 60%)
CMYK	cmyk(73.9%, 50.3%, 0%, 40%)
CIE-LAB	lab(33.81, 14.92, -45.93)
CIE-LCH	lch(33.81, 48.30, 287.99°)
OKLab	oklab(43.45% -0.0158 -0.1319)
OKLCH	oklch(43.45% 0.133 263.1)
XYZ	xyz(9.2072, 7.9189, 31.1741)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284C99 #997528

analogous

#288499 #284C99 #3D2899

triadic

#284C99 #99284C #4C9928

tetradic

#284C99 #992884 #997528 #28993D

square

#284C99 #992884 #997528 #28993D

split-complementary

#284C99 #993D28 #849928

monochromatic

#0F1C38 #1B3468 #284C99 #3564CA #6589D7

Accessibility & contrast

On white

8.13

#284C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#284C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284C99

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284C99	#FFFFFF	#000000	##FFFFFF
##284C99	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F559C

Deuteranopia (green-blind)

#004B97

Tritanopia (blue-blind)

#005E6B

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284c99;
/* rgb */ color: rgb(40, 76, 153);
/* oklch */ color: oklch(43.5% 0.133 263.1);

Tailwind

colors: {
  custom: {
    50: '#727db8',
    500: '#284c99',
    950: '#000000',
  },
}

SCSS

$custom: #284c99;
$custom-light: #727db8;
$custom-dark: #000000;

JSON

{
  "hex": "#284c99",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 153
  },
  "hsl": {
    "h": 220.885,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.43454,
    "c": 0.13288,
    "h": 263.1
  },
  "luminance": 0.0792
}

Semantic roles & 50–950 ramp

primary

#284C99

secondary

#BD9F60

accent

#B046E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #284C99

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

Preview Lab → · Contrast checker → · Palette generator →