#284FB3#284FB3

#284FB3 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.1% C 0.165 H 264.6°. Best body text is #FFFFFF at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#284FB3
RGB	rgb(40, 79, 179)
HSL	hsl(223, 63%, 43%)
HSV	hsv(223, 78%, 70%)
CMYK	cmyk(77.7%, 55.9%, 0%, 29.8%)
CIE-LAB	lab(36.55, 22.96, -57.05)
CIE-LCH	lch(36.55, 61.50, 291.92°)
OKLab	oklab(46.13% -0.0156 -0.1646)
OKLCH	oklch(46.13% 0.165 264.6)
XYZ	xyz(11.8049, 9.2964, 43.8113)
Luminance	0.0930 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FB3 #B38C28

analogous

#2895B3 #284FB3 #4628B3

triadic

#284FB3 #B3284F #4FB328

tetradic

#284FB3 #B32895 #B38C28 #28B346

square

#284FB3 #B32895 #B38C28 #28B346

split-complementary

#284FB3 #B34628 #95B328

monochromatic

#12234F #1D3981 #284FB3 #436CD5 #7593E0

Accessibility & contrast

On white

7.34

#284FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#284FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FB3

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FB3	#FFFFFF	#000000	##FFFFFF
##284FB3	1.00	7.34	2.86	7.34
#FFFFFF	7.34	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB6

Deuteranopia (green-blind)

#0050B1

Tritanopia (blue-blind)

#006879

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #284fb3;
/* rgb */ color: rgb(40, 79, 179);
/* oklch */ color: oklch(46.1% 0.165 264.6);

Tailwind

colors: {
  custom: {
    50: '#777fca',
    500: '#284fb3',
    950: '#000000',
  },
}

SCSS

$custom: #284fb3;
$custom-light: #777fca;
$custom-dark: #000000;

JSON

{
  "hex": "#284fb3",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 179
  },
  "hsl": {
    "h": 223.165,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.4613,
    "c": 0.16532,
    "h": 264.6
  },
  "luminance": 0.09298
}

Semantic roles & 50–950 ramp

primary

#284FB3

secondary

#C8AF6F

accent

#B841E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #284FB3

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

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