#284CB9#284CB9

#284CB9 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.0% C 0.177 H 265.7°. Best body text is #FFFFFF at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#284CB9
RGB	rgb(40, 76, 185)
HSL	hsl(225, 64%, 44%)
HSV	hsv(225, 78%, 73%)
CMYK	cmyk(78.4%, 58.9%, 0%, 27.5%)
CIE-LAB	lab(36.22, 27.24, -61.13)
CIE-LCH	lch(36.22, 66.92, 294.02°)
OKLab	oklab(46.03% -0.0133 -0.1766)
OKLCH	oklch(46.03% 0.177 265.7)
XYZ	xyz(12.2134, 9.1214, 47.0064)
Luminance	0.0912 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CB9 #B99528

analogous

#2895B9 #284CB9 #4C28B9

triadic

#284CB9 #B9284C #4CB928

tetradic

#284CB9 #B92895 #B99528 #28B94C

square

#284CB9 #B92895 #B99528 #28B94C

split-complementary

#284CB9 #B94C28 #95B928

monochromatic

#122354 #1D3787 #284CB9 #476BD7 #7993E2

Accessibility & contrast

On white

7.43

#284CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#284CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CB9

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CB9	#FFFFFF	#000000	##FFFFFF
##284CB9	1.00	7.43	2.82	7.43
#FFFFFF	7.43	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBD

Deuteranopia (green-blind)

#004FB7

Tritanopia (blue-blind)

#00687B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #284cb9;
/* rgb */ color: rgb(40, 76, 185);
/* oklch */ color: oklch(46.0% 0.177 265.7);

Tailwind

colors: {
  custom: {
    50: '#797dcf',
    500: '#284cb9',
    950: '#000000',
  },
}

SCSS

$custom: #284cb9;
$custom-light: #797dcf;
$custom-dark: #000000;

JSON

{
  "hex": "#284cb9",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 185
  },
  "hsl": {
    "h": 225.103,
    "s": 64.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.46028,
    "c": 0.17711,
    "h": 265.7
  },
  "luminance": 0.09123
}

Semantic roles & 50–950 ramp

primary

#284CB9

secondary

#CAB473

accent

#BE40E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #284CB9

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

Preview Lab → · Contrast checker → · Palette generator →