#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
RGBrgb(99, 102, 224)
HSLhsl(239, 67%, 63%)
HSVhsv(239, 56%, 88%)
CMYKcmyk(55.8%, 54.5%, 0%, 12.2%)
CIE-LABlab(48.93, 33.28, -62.83)
CIE-LCHlch(48.93, 71.10, 297.91°)
OKLaboklab(57.3% 0.0251 -0.18)
OKLCHoklch(57.3% 0.182 277.9)
XYZxyz(23.3472, 17.5356, 72.6610)
Luminance0.1754 (WCAG relative)
Temperaturecool
Familyblue

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
##6366E01.004.664.514.66
#FFFFFF4.661.0021.001.00
#0000004.5121.001.0021.00
##FFFFFF4.661.0021.001.00

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 →

#6366E0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva