#284DB9#284DB9

#284DB9 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.2% C 0.176 H 265.5°. Best body text is #FFFFFF at 7.36:1 contrast (WCAG AA passes).

Color values

HEX	#284DB9
RGB	rgb(40, 77, 185)
HSL	hsl(225, 64%, 44%)
HSV	hsv(225, 78%, 73%)
CMYK	cmyk(78.4%, 58.4%, 0%, 27.5%)
CIE-LAB	lab(36.48, 26.58, -60.70)
CIE-LCH	lch(36.48, 66.26, 293.65°)
OKLab	oklab(46.23% -0.0139 -0.1753)
OKLCH	oklch(46.23% 0.176 265.5)
XYZ	xyz(12.2828, 9.2602, 47.0296)
Luminance	0.0926 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DB9 #B99428

analogous

#2896B9 #284DB9 #4C28B9

triadic

#284DB9 #B9284D #4DB928

tetradic

#284DB9 #B92896 #B99428 #28B94C

square

#284DB9 #B92896 #B99428 #28B94C

split-complementary

#284DB9 #B94C28 #96B928

monochromatic

#122354 #1D3887 #284DB9 #476CD7 #7994E2

Accessibility & contrast

On white

7.36

#284DB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#284DB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DB9

7.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DB9	#FFFFFF	#000000	##FFFFFF
##284DB9	1.00	7.36	2.85	7.36
#FFFFFF	7.36	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBD

Deuteranopia (green-blind)

#004FB7

Tritanopia (blue-blind)

#00687B

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #284db9;
/* rgb */ color: rgb(40, 77, 185);
/* oklch */ color: oklch(46.2% 0.176 265.5);

Tailwind

colors: {
  custom: {
    50: '#797ecf',
    500: '#284db9',
    950: '#000000',
  },
}

SCSS

$custom: #284db9;
$custom-light: #797ecf;
$custom-dark: #000000;

JSON

{
  "hex": "#284db9",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 185
  },
  "hsl": {
    "h": 224.69,
    "s": 64.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.46225,
    "c": 0.17588,
    "h": 265.5
  },
  "luminance": 0.09262
}

Semantic roles & 50–950 ramp

primary

#284DB9

secondary

#CAB473

accent

#BD40E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #284DB9

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

Preview Lab → · Contrast checker → · Palette generator →