#6366E0#6366E0

#6366E0 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 57.3% C 0.182 H 277.9°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#6366E0
RGB	rgb(99, 102, 224)
HSL	hsl(239, 67%, 63%)
HSV	hsv(239, 56%, 88%)
CMYK	cmyk(55.8%, 54.5%, 0%, 12.2%)
CIE-LAB	lab(48.93, 33.28, -62.83)
CIE-LCH	lch(48.93, 71.10, 297.91°)
OKLab	oklab(57.3% 0.0251 -0.18)
OKLCH	oklch(57.3% 0.182 277.9)
XYZ	xyz(23.3472, 17.5356, 72.6610)
Luminance	0.1754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366E0 #E0DD63

analogous

#63A4E0 #6366E0 #9E63E0

triadic

#6366E0 #E06366 #66E063

tetradic

#6366E0 #E063A4 #E0DD63 #63E09E

square

#6366E0 #E063A4 #E0DD63 #63E09E

split-complementary

#6366E0 #E09E63 #A4E063

monochromatic

#2124A7 #3034D6 #6366E0 #9698EA #C9CAF4

Accessibility & contrast

On white

4.66

#6366E0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#6366E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #6366E0

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366E0	#FFFFFF	#000000	##FFFFFF
##6366E0	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1279E4

Deuteranopia (green-blind)

#006FDD

Tritanopia (blue-blind)

#1E8299

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #6366e0;
/* rgb */ color: rgb(99, 102, 224);
/* oklch */ color: oklch(57.3% 0.182 277.9);

Tailwind

colors: {
  custom: {
    50: '#9991ea',
    500: '#6366e0',
    950: '#000000',
  },
}

SCSS

$custom: #6366e0;
$custom-light: #9991ea;
$custom-dark: #000000;

JSON

{
  "hex": "#6366e0",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 224
  },
  "hsl": {
    "h": 238.56,
    "s": 66.845,
    "l": 63.333
  },
  "oklch": {
    "l": 0.57296,
    "c": 0.1817,
    "h": 277.9
  },
  "luminance": 0.17537
}

Semantic roles & 50–950 ramp

primary

#6366E0

secondary

#E6E5B9

accent

#CA17CF

background

#FAF8FE

surface

#F3F0FD

border

#CDCBD5

text

#0F0D16

muted

#7F7D84

Preview Lab

Preview with #6366E0

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

Preview Lab → · Contrast checker → · Palette generator →