#284EB9#284EB9

#284EB9 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.4% C 0.175 H 265.2°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#284EB9
RGB	rgb(40, 78, 185)
HSL	hsl(224, 64%, 44%)
HSV	hsv(224, 78%, 73%)
CMYK	cmyk(78.4%, 57.8%, 0%, 27.5%)
CIE-LAB	lab(36.75, 25.92, -60.27)
CIE-LCH	lch(36.75, 65.60, 293.27°)
OKLab	oklab(46.42% -0.0146 -0.174)
OKLCH	oklch(46.42% 0.175 265.2)
XYZ	xyz(12.3533, 9.4013, 47.0531)
Luminance	0.0940 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284EB9 #B99328

analogous

#2897B9 #284EB9 #4B28B9

triadic

#284EB9 #B9284E #4EB928

tetradic

#284EB9 #B92897 #B99328 #28B94B

square

#284EB9 #B92897 #B99328 #28B94B

split-complementary

#284EB9 #B94B28 #97B928

monochromatic

#122454 #1D3987 #284EB9 #476DD7 #7995E2

Accessibility & contrast

On white

7.29

#284EB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#284EB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284EB9

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284EB9	#FFFFFF	#000000	##FFFFFF
##284EB9	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBD

Deuteranopia (green-blind)

#0050B7

Tritanopia (blue-blind)

#00697C

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #284eb9;
/* rgb */ color: rgb(40, 78, 185);
/* oklch */ color: oklch(46.4% 0.175 265.2);

Tailwind

colors: {
  custom: {
    50: '#797fcf',
    500: '#284eb9',
    950: '#000000',
  },
}

SCSS

$custom: #284eb9;
$custom-light: #797fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#284eb9",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 185
  },
  "hsl": {
    "h": 224.276,
    "s": 64.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.46424,
    "c": 0.17465,
    "h": 265.2
  },
  "luminance": 0.09403
}

Semantic roles & 50–950 ramp

primary

#284EB9

secondary

#CAB373

accent

#BC40E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #284EB9

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

Preview Lab → · Contrast checker → · Palette generator →