#6366B4#6366B4

#6366B4 is a mid, vivid blue. Relative luminance 0.155; OKLCH L 54.4% C 0.120 H 279.9°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#6366B4
RGB	rgb(99, 102, 180)
HSL	hsl(238, 35%, 55%)
HSV	hsv(238, 45%, 71%)
CMYK	cmyk(45%, 43.3%, 0%, 29.4%)
CIE-LAB	lab(46.24, 19.54, -41.88)
CIE-LCH	lch(46.24, 46.21, 295.02°)
OKLab	oklab(54.41% 0.0208 -0.1184)
OKLCH	oklch(54.41% 0.12 279.9)
XYZ	xyz(18.1327, 15.4498, 45.1978)
Luminance	0.1545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366B4 #B4B163

analogous

#638EB4 #6366B4 #8963B4

triadic

#6366B4 #B46366 #66B463

tetradic

#6366B4 #B4638E #B4B163 #63B489

square

#6366B4 #B4638E #B4B163 #63B489

split-complementary

#6366B4 #B48963 #8EB463

monochromatic

#33356A #474A93 #6366B4 #8C8FC8 #B6B7DC

Accessibility & contrast

On white

5.13

#6366B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#6366B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366B4

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366B4	#FFFFFF	#000000	##FFFFFF
##6366B4	1.00	5.13	4.09	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4871B7

Deuteranopia (green-blind)

#436BB2

Tritanopia (blue-blind)

#487684

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #6366b4;
/* rgb */ color: rgb(99, 102, 180);
/* oklch */ color: oklch(54.4% 0.120 279.9);

Tailwind

colors: {
  custom: {
    50: '#9491cb',
    500: '#6366b4',
    950: '#000000',
  },
}

SCSS

$custom: #6366b4;
$custom-light: #9491cb;
$custom-dark: #000000;

JSON

{
  "hex": "#6366b4",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 180
  },
  "hsl": {
    "h": 237.778,
    "s": 35.065,
    "l": 54.706
  },
  "oklch": {
    "l": 0.54411,
    "c": 0.12022,
    "h": 279.9
  },
  "luminance": 0.15451
}

Semantic roles & 50–950 ramp

primary

#6366B4

secondary

#CAC9A8

accent

#C75DCB

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0D0C13

muted

#7E7D82

Preview Lab

Preview with #6366B4

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

Preview Lab → · Contrast checker → · Palette generator →