#284FB5#284FB5

#284FB5 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.3% C 0.168 H 264.7°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#284FB5
RGB	rgb(40, 79, 181)
HSL	hsl(223, 64%, 43%)
HSV	hsv(223, 78%, 71%)
CMYK	cmyk(77.9%, 56.4%, 0%, 29%)
CIE-LAB	lab(36.70, 23.73, -57.98)
CIE-LCH	lch(36.70, 62.65, 292.26°)
OKLab	oklab(46.29% -0.0155 -0.1673)
OKLCH	oklch(46.29% 0.168 264.7)
XYZ	xyz(12.0086, 9.3779, 44.8843)
Luminance	0.0938 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FB5 #B58E28

analogous

#2895B5 #284FB5 #4728B5

triadic

#284FB5 #B5284F #4FB528

tetradic

#284FB5 #B52895 #B58E28 #28B547

square

#284FB5 #B52895 #B58E28 #28B547

split-complementary

#284FB5 #B54728 #95B528

monochromatic

#122351 #1D3983 #284FB5 #446DD6 #7794E1

Accessibility & contrast

On white

7.30

#284FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#284FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FB5

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FB5	#FFFFFF	#000000	##FFFFFF
##284FB5	1.00	7.30	2.88	7.30
#FFFFFF	7.30	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB9

Deuteranopia (green-blind)

#0050B3

Tritanopia (blue-blind)

#00687A

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #284fb5;
/* rgb */ color: rgb(40, 79, 181);
/* oklch */ color: oklch(46.3% 0.168 264.7);

Tailwind

colors: {
  custom: {
    50: '#787fcc',
    500: '#284fb5',
    950: '#000000',
  },
}

SCSS

$custom: #284fb5;
$custom-light: #787fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#284fb5",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 181
  },
  "hsl": {
    "h": 223.404,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.46294,
    "c": 0.16804,
    "h": 264.7
  },
  "luminance": 0.09379
}

Semantic roles & 50–950 ramp

primary

#284FB5

secondary

#C8B070

accent

#B941E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #284FB5

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

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