#284CB5#284CB5

#284CB5 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.7% C 0.172 H 265.5°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#284CB5
RGB	rgb(40, 76, 181)
HSL	hsl(225, 64%, 43%)
HSV	hsv(225, 78%, 71%)
CMYK	cmyk(77.9%, 58%, 0%, 29%)
CIE-LAB	lab(35.90, 25.72, -59.29)
CIE-LCH	lch(35.90, 64.63, 293.45°)
OKLab	oklab(45.69% -0.0134 -0.1712)
OKLCH	oklch(45.69% 0.172 265.5)
XYZ	xyz(11.7971, 8.9548, 44.8138)
Luminance	0.0896 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CB5 #B59128

analogous

#2892B5 #284CB5 #4A28B5

triadic

#284CB5 #B5284C #4CB528

tetradic

#284CB5 #B52892 #B59128 #28B54A

square

#284CB5 #B52892 #B59128 #28B54A

split-complementary

#284CB5 #B54A28 #92B528

monochromatic

#122251 #1D3783 #284CB5 #446AD6 #7792E1

Accessibility & contrast

On white

7.52

#284CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#284CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CB5

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CB5	#FFFFFF	#000000	##FFFFFF
##284CB5	1.00	7.52	2.79	7.52
#FFFFFF	7.52	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB9

Deuteranopia (green-blind)

#004EB3

Tritanopia (blue-blind)

#006679

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284cb5;
/* rgb */ color: rgb(40, 76, 181);
/* oklch */ color: oklch(45.7% 0.172 265.5);

Tailwind

colors: {
  custom: {
    50: '#787dcc',
    500: '#284cb5',
    950: '#000000',
  },
}

SCSS

$custom: #284cb5;
$custom-light: #787dcc;
$custom-dark: #000000;

JSON

{
  "hex": "#284cb5",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 181
  },
  "hsl": {
    "h": 224.681,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.45689,
    "c": 0.17173,
    "h": 265.5
  },
  "luminance": 0.08956
}

Semantic roles & 50–950 ramp

primary

#284CB5

secondary

#C8B270

accent

#BC41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284CB5

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

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