#284B9C#284B9C

#284B9C is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.5% C 0.138 H 263.9°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#284B9C
RGB	rgb(40, 75, 156)
HSL	hsl(222, 59%, 38%)
HSV	hsv(222, 74%, 61%)
CMYK	cmyk(74.4%, 51.9%, 0%, 38.8%)
CIE-LAB	lab(33.74, 16.76, -47.87)
CIE-LCH	lch(33.74, 50.72, 289.29°)
OKLab	oklab(43.46% -0.0146 -0.1376)
OKLCH	oklch(43.46% 0.138 263.9)
XYZ	xyz(9.3898, 7.8826, 32.4727)
Luminance	0.0788 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284B9C #9C7928

analogous

#28859C #284B9C #3F289C

triadic

#284B9C #9C284B #4B9C28

tetradic

#284B9C #9C2885 #9C7928 #289C3F

square

#284B9C #9C2885 #9C7928 #289C3F

split-complementary

#284B9C #9C3F28 #859C28

monochromatic

#0F1C3B #1C346B #284B9C #3663CB #6789D8

Accessibility & contrast

On white

8.15

#284B9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#284B9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284B9C

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284B9C	#FFFFFF	#000000	##FFFFFF
##284B9C	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18559F

Deuteranopia (green-blind)

#004A9A

Tritanopia (blue-blind)

#005E6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284b9c;
/* rgb */ color: rgb(40, 75, 156);
/* oklch */ color: oklch(43.5% 0.138 263.9);

Tailwind

colors: {
  custom: {
    50: '#727cba',
    500: '#284b9c',
    950: '#000000',
  },
}

SCSS

$custom: #284b9c;
$custom-light: #727cba;
$custom-dark: #000000;

JSON

{
  "hex": "#284b9c",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 156
  },
  "hsl": {
    "h": 221.897,
    "s": 59.184,
    "l": 38.431
  },
  "oklch": {
    "l": 0.43463,
    "c": 0.13841,
    "h": 263.9
  },
  "luminance": 0.07884
}

Semantic roles & 50–950 ramp

primary

#284B9C

secondary

#BEA262

accent

#B345E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284B9C

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

Preview Lab → · Contrast checker → · Palette generator →