#284B9D#284B9D

#284B9D is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.5% C 0.140 H 264.1°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#284B9D
RGB	rgb(40, 75, 157)
HSL	hsl(222, 59%, 39%)
HSV	hsv(222, 75%, 62%)
CMYK	cmyk(74.5%, 52.2%, 0%, 38.4%)
CIE-LAB	lab(33.81, 17.14, -48.36)
CIE-LCH	lch(33.81, 51.31, 289.52°)
OKLab	oklab(43.54% -0.0145 -0.1391)
OKLCH	oklch(43.54% 0.14 264.1)
XYZ	xyz(9.4748, 7.9166, 32.9205)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284B9D #9D7A28

analogous

#28859D #284B9D #3F289D

triadic

#284B9D #9D284B #4B9D28

tetradic

#284B9D #9D2885 #9D7A28 #289D3F

square

#284B9D #9D2885 #9D7A28 #289D3F

split-complementary

#284B9D #9D3F28 #859D28

monochromatic

#0F1C3B #1C346C #284B9D #3663CC #6789D8

Accessibility & contrast

On white

8.13

#284B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#284B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284B9D

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284B9D	#FFFFFF	#000000	##FFFFFF
##284B9D	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)

#1655A0

Deuteranopia (green-blind)

#004A9B

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284b9d;
/* rgb */ color: rgb(40, 75, 157);
/* oklch */ color: oklch(43.5% 0.140 264.1);

Tailwind

colors: {
  custom: {
    50: '#727cba',
    500: '#284b9d',
    950: '#000000',
  },
}

SCSS

$custom: #284b9d;
$custom-light: #727cba;
$custom-dark: #000000;

JSON

{
  "hex": "#284b9d",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 157
  },
  "hsl": {
    "h": 222.051,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.4354,
    "c": 0.13983,
    "h": 264.1
  },
  "luminance": 0.07918
}

Semantic roles & 50–950 ramp

primary

#284B9D

secondary

#BEA362

accent

#B445E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284B9D

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

Preview Lab → · Contrast checker → · Palette generator →