#284DB5#284DB5

#284DB5 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.9% C 0.171 H 265.3°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#284DB5
RGB	rgb(40, 77, 181)
HSL	hsl(224, 64%, 43%)
HSV	hsv(224, 78%, 71%)
CMYK	cmyk(77.9%, 57.5%, 0%, 29%)
CIE-LAB	lab(36.16, 25.05, -58.86)
CIE-LCH	lch(36.16, 63.97, 293.06°)
OKLab	oklab(45.89% -0.0141 -0.1699)
OKLCH	oklch(45.89% 0.171 265.3)
XYZ	xyz(11.8665, 9.0937, 44.8370)
Luminance	0.0910 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DB5 #B59028

analogous

#2893B5 #284DB5 #4928B5

triadic

#284DB5 #B5284D #4DB528

tetradic

#284DB5 #B52893 #B59028 #28B549

square

#284DB5 #B52893 #B59028 #28B549

split-complementary

#284DB5 #B54928 #93B528

monochromatic

#122251 #1D3883 #284DB5 #446BD6 #7792E1

Accessibility & contrast

On white

7.45

#284DB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#284DB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DB5

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DB5	#FFFFFF	#000000	##FFFFFF
##284DB5	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB9

Deuteranopia (green-blind)

#004FB3

Tritanopia (blue-blind)

#006779

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #284db5;
/* rgb */ color: rgb(40, 77, 181);
/* oklch */ color: oklch(45.9% 0.171 265.3);

Tailwind

colors: {
  custom: {
    50: '#787ecc',
    500: '#284db5',
    950: '#000000',
  },
}

SCSS

$custom: #284db5;
$custom-light: #787ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#284db5",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 181
  },
  "hsl": {
    "h": 224.255,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.45889,
    "c": 0.1705,
    "h": 265.3
  },
  "luminance": 0.09095
}

Semantic roles & 50–950 ramp

primary

#284DB5

secondary

#C8B170

accent

#BB41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284DB5

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

Preview Lab → · Contrast checker → · Palette generator →