#284D9C#284D9C

#284D9C is a dark, vivid blue. Relative luminance 0.082; OKLCH L 43.9% C 0.136 H 263.1°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#284D9C
RGB	rgb(40, 77, 156)
HSL	hsl(221, 59%, 38%)
HSV	hsv(221, 74%, 61%)
CMYK	cmyk(74.4%, 50.6%, 0%, 38.8%)
CIE-LAB	lab(34.31, 15.41, -46.95)
CIE-LCH	lch(34.31, 49.41, 288.18°)
OKLab	oklab(43.9% -0.0163 -0.1349)
OKLCH	oklch(43.9% 0.136 263.1)
XYZ	xyz(9.5276, 8.1581, 32.5186)
Luminance	0.0816 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D9C #9C7728

analogous

#28879C #284D9C #3D289C

triadic

#284D9C #9C284D #4D9C28

tetradic

#284D9C #9C2887 #9C7728 #289C3D

square

#284D9C #9C2887 #9C7728 #289C3D

split-complementary

#284D9C #9C3D28 #879C28

monochromatic

#0F1D3B #1C356B #284D9C #3666CB #678BD8

Accessibility & contrast

On white

7.98

#284D9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#284D9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D9C

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D9C	#FFFFFF	#000000	##FFFFFF
##284D9C	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E569F

Deuteranopia (green-blind)

#004C9A

Tritanopia (blue-blind)

#00606D

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #284d9c;
/* rgb */ color: rgb(40, 77, 156);
/* oklch */ color: oklch(43.9% 0.136 263.1);

Tailwind

colors: {
  custom: {
    50: '#727eba',
    500: '#284d9c',
    950: '#000000',
  },
}

SCSS

$custom: #284d9c;
$custom-light: #727eba;
$custom-dark: #000000;

JSON

{
  "hex": "#284d9c",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 156
  },
  "hsl": {
    "h": 220.862,
    "s": 59.184,
    "l": 38.431
  },
  "oklch": {
    "l": 0.43899,
    "c": 0.13587,
    "h": 263.1
  },
  "luminance": 0.08159
}

Semantic roles & 50–950 ramp

primary

#284D9C

secondary

#BEA162

accent

#B045E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284D9C

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

Preview Lab → · Contrast checker → · Palette generator →