#6366E6#6366E6

#6366E6 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.7% C 0.190 H 277.6°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#6366E6
RGB	rgb(99, 102, 230)
HSL	hsl(239, 72%, 65%)
HSV	hsv(239, 57%, 90%)
CMYK	cmyk(57%, 55.7%, 0%, 9.8%)
CIE-LAB	lab(49.33, 35.18, -65.56)
CIE-LCH	lch(49.33, 74.40, 298.22°)
OKLab	oklab(57.73% 0.0252 -0.188)
OKLCH	oklch(57.73% 0.19 277.6)
XYZ	xyz(24.1753, 17.8669, 77.0223)
Luminance	0.1787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366E6 #E6E363

analogous

#63A8E6 #6366E6 #A263E6

triadic

#6366E6 #E66366 #66E663

tetradic

#6366E6 #E663A8 #E6E363 #63E6A2

square

#6366E6 #E663A8 #E6E363 #63E6A2

split-complementary

#6366E6 #E6A263 #A8E663

monochromatic

#1D20B2 #2E32DE #6366E6 #989AEE #CCCDF7

Accessibility & contrast

On white

4.59

#6366E6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#6366E6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #6366E6

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366E6	#FFFFFF	#000000	##FFFFFF
##6366E6	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BEA

Deuteranopia (green-blind)

#0070E3

Tritanopia (blue-blind)

#10849C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #6366e6;
/* rgb */ color: rgb(99, 102, 230);
/* oklch */ color: oklch(57.7% 0.190 277.6);

Tailwind

colors: {
  custom: {
    50: '#9a91ef',
    500: '#6366e6',
    950: '#000000',
  },
}

SCSS

$custom: #6366e6;
$custom-light: #9a91ef;
$custom-dark: #000000;

JSON

{
  "hex": "#6366e6",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 230
  },
  "hsl": {
    "h": 238.626,
    "s": 72.376,
    "l": 64.51
  },
  "oklch": {
    "l": 0.57728,
    "c": 0.18968,
    "h": 277.6
  },
  "luminance": 0.17869
}

Semantic roles & 50–950 ramp

primary

#6366E6

secondary

#E9E8BC

accent

#D011D4

background

#FAF8FE

surface

#F4F0FD

border

#CECBD5

text

#0F0D16

muted

#7F7D84

Preview Lab

Preview with #6366E6

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

Preview Lab → · Contrast checker → · Palette generator →