#284EB5#284EB5

#284EB5 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.1% C 0.169 H 265.0°. Best body text is #FFFFFF at 7.38:1 contrast (WCAG AA passes).

Color values

HEX	#284EB5
RGB	rgb(40, 78, 181)
HSL	hsl(224, 64%, 43%)
HSV	hsv(224, 78%, 71%)
CMYK	cmyk(77.9%, 56.9%, 0%, 29%)
CIE-LAB	lab(36.43, 24.39, -58.42)
CIE-LCH	lch(36.43, 63.31, 292.66°)
OKLab	oklab(46.09% -0.0148 -0.1686)
OKLCH	oklch(46.09% 0.169 265)
XYZ	xyz(11.9370, 9.2347, 44.8605)
Luminance	0.0924 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284EB5 #B58F28

analogous

#2894B5 #284EB5 #4828B5

triadic

#284EB5 #B5284E #4EB528

tetradic

#284EB5 #B52894 #B58F28 #28B548

square

#284EB5 #B52894 #B58F28 #28B548

split-complementary

#284EB5 #B54828 #94B528

monochromatic

#122351 #1D3883 #284EB5 #446CD6 #7793E1

Accessibility & contrast

On white

7.38

#284EB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#284EB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284EB5

7.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284EB5	#FFFFFF	#000000	##FFFFFF
##284EB5	1.00	7.38	2.85	7.38
#FFFFFF	7.38	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB9

Deuteranopia (green-blind)

#004FB3

Tritanopia (blue-blind)

#00687A

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #284eb5;
/* rgb */ color: rgb(40, 78, 181);
/* oklch */ color: oklch(46.1% 0.169 265.0);

Tailwind

colors: {
  custom: {
    50: '#787fcc',
    500: '#284eb5',
    950: '#000000',
  },
}

SCSS

$custom: #284eb5;
$custom-light: #787fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#284eb5",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 181
  },
  "hsl": {
    "h": 223.83,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.46091,
    "c": 0.16927,
    "h": 265
  },
  "luminance": 0.09236
}

Semantic roles & 50–950 ramp

primary

#284EB5

secondary

#C8B170

accent

#BA41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #284EB5

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

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