#284E9C#284E9C

#284E9C is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.1% C 0.135 H 262.7°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#284E9C
RGB	rgb(40, 78, 156)
HSL	hsl(220, 59%, 38%)
HSV	hsv(220, 74%, 61%)
CMYK	cmyk(74.4%, 50%, 0%, 38.8%)
CIE-LAB	lab(34.60, 14.74, -46.48)
CIE-LCH	lch(34.60, 48.76, 287.60°)
OKLab	oklab(44.12% -0.0172 -0.1335)
OKLCH	oklch(44.12% 0.135 262.7)
XYZ	xyz(9.5981, 8.2992, 32.5421)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284E9C #9C7628

analogous

#28889C #284E9C #3C289C

triadic

#284E9C #9C284E #4E9C28

tetradic

#284E9C #9C2888 #9C7628 #289C3C

square

#284E9C #9C2888 #9C7628 #289C3C

split-complementary

#284E9C #9C3C28 #889C28

monochromatic

#0F1D3B #1C366B #284E9C #3667CB #678CD8

Accessibility & contrast

On white

7.89

#284E9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#284E9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284E9C

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284E9C	#FFFFFF	#000000	##FFFFFF
##284E9C	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21579F

Deuteranopia (green-blind)

#004C9A

Tritanopia (blue-blind)

#00616D

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #284e9c;
/* rgb */ color: rgb(40, 78, 156);
/* oklch */ color: oklch(44.1% 0.135 262.7);

Tailwind

colors: {
  custom: {
    50: '#727fba',
    500: '#284e9c',
    950: '#000000',
  },
}

SCSS

$custom: #284e9c;
$custom-light: #727fba;
$custom-dark: #000000;

JSON

{
  "hex": "#284e9c",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 156
  },
  "hsl": {
    "h": 220.345,
    "s": 59.184,
    "l": 38.431
  },
  "oklch": {
    "l": 0.44119,
    "c": 0.1346,
    "h": 262.7
  },
  "luminance": 0.083
}

Semantic roles & 50–950 ramp

primary

#284E9C

secondary

#BEA062

accent

#AF45E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284E9C

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

Preview Lab → · Contrast checker → · Palette generator →