#284FB9#284FB9

#284FB9 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.6% C 0.173 H 265.0°. Best body text is #FFFFFF at 7.22:1 contrast (WCAG AA passes).

Color values

HEX	#284FB9
RGB	rgb(40, 79, 185)
HSL	hsl(224, 64%, 44%)
HSV	hsv(224, 78%, 73%)
CMYK	cmyk(78.4%, 57.3%, 0%, 27.5%)
CIE-LAB	lab(37.01, 25.26, -59.83)
CIE-LCH	lch(37.01, 64.95, 292.89°)
OKLab	oklab(46.62% -0.0153 -0.1727)
OKLCH	oklch(46.62% 0.173 265)
XYZ	xyz(12.4249, 9.5444, 47.0770)
Luminance	0.0955 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FB9 #B99228

analogous

#2898B9 #284FB9 #4A28B9

triadic

#284FB9 #B9284F #4FB928

tetradic

#284FB9 #B92898 #B99228 #28B94A

square

#284FB9 #B92898 #B99228 #28B94A

split-complementary

#284FB9 #B94A28 #98B928

monochromatic

#122454 #1D3A87 #284FB9 #476ED7 #7995E2

Accessibility & contrast

On white

7.22

#284FB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#284FB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FB9

7.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FB9	#FFFFFF	#000000	##FFFFFF
##284FB9	1.00	7.22	2.91	7.22
#FFFFFF	7.22	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBD

Deuteranopia (green-blind)

#0051B7

Tritanopia (blue-blind)

#006A7C

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #284fb9;
/* rgb */ color: rgb(40, 79, 185);
/* oklch */ color: oklch(46.6% 0.173 265.0);

Tailwind

colors: {
  custom: {
    50: '#797fcf',
    500: '#284fb9',
    950: '#000000',
  },
}

SCSS

$custom: #284fb9;
$custom-light: #797fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#284fb9",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 185
  },
  "hsl": {
    "h": 223.862,
    "s": 64.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.46624,
    "c": 0.17342,
    "h": 265
  },
  "luminance": 0.09546
}

Semantic roles & 50–950 ramp

primary

#284FB9

secondary

#CAB373

accent

#BA40E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #284FB9

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

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