#284C9D#284C9D

#284C9D is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.8% C 0.139 H 263.6°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#284C9D
RGB	rgb(40, 76, 157)
HSL	hsl(222, 59%, 39%)
HSV	hsv(222, 75%, 62%)
CMYK	cmyk(74.5%, 51.6%, 0%, 38.4%)
CIE-LAB	lab(34.09, 16.47, -47.90)
CIE-LCH	lch(34.09, 50.65, 288.98°)
OKLab	oklab(43.76% -0.0153 -0.1377)
OKLCH	oklch(43.76% 0.139 263.6)
XYZ	xyz(9.5432, 8.0533, 32.9432)
Luminance	0.0805 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284C9D #9D7928

analogous

#28869D #284C9D #3E289D

triadic

#284C9D #9D284C #4C9D28

tetradic

#284C9D #9D2886 #9D7928 #289D3E

square

#284C9D #9D2886 #9D7928 #289D3E

split-complementary

#284C9D #9D3E28 #869D28

monochromatic

#0F1D3B #1C346C #284C9D #3664CC #678AD8

Accessibility & contrast

On white

8.04

#284C9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#284C9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284C9D

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284C9D	#FFFFFF	#000000	##FFFFFF
##284C9D	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A56A0

Deuteranopia (green-blind)

#004B9B

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284c9d;
/* rgb */ color: rgb(40, 76, 157);
/* oklch */ color: oklch(43.8% 0.139 263.6);

Tailwind

colors: {
  custom: {
    50: '#727dba',
    500: '#284c9d',
    950: '#000000',
  },
}

SCSS

$custom: #284c9d;
$custom-light: #727dba;
$custom-dark: #000000;

JSON

{
  "hex": "#284c9d",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 157
  },
  "hsl": {
    "h": 221.538,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.43757,
    "c": 0.13856,
    "h": 263.6
  },
  "luminance": 0.08054
}

Semantic roles & 50–950 ramp

primary

#284C9D

secondary

#BEA262

accent

#B245E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284C9D

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

Preview Lab → · Contrast checker → · Palette generator →