#6366E7#6366E7

#6366E7 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.8% C 0.191 H 277.6°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#6366E7
RGB	rgb(99, 102, 231)
HSL	hsl(239, 73%, 65%)
HSV	hsv(239, 57%, 91%)
CMYK	cmyk(57.1%, 55.8%, 0%, 9.4%)
CIE-LAB	lab(49.40, 35.50, -66.01)
CIE-LCH	lch(49.40, 74.95, 298.27°)
OKLab	oklab(57.8% 0.0253 -0.1893)
OKLCH	oklch(57.8% 0.191 277.6)
XYZ	xyz(24.3162, 17.9232, 77.7640)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366E7 #E7E463

analogous

#63A8E7 #6366E7 #A263E7

triadic

#6366E7 #E76366 #66E763

tetradic

#6366E7 #E763A8 #E7E463 #63E7A2

square

#6366E7 #E763A8 #E7E463 #63E7A2

split-complementary

#6366E7 #E7A263 #A8E763

monochromatic

#1C1FB4 #2E32DF #6366E7 #989AEF #CDCEF7

Accessibility & contrast

On white

4.58

#6366E7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#6366E7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366E7

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366E7	#FFFFFF	#000000	##000000
##6366E7	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BEB

Deuteranopia (green-blind)

#0070E4

Tritanopia (blue-blind)

#0C849D

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #6366e7;
/* rgb */ color: rgb(99, 102, 231);
/* oklch */ color: oklch(57.8% 0.191 277.6);

Tailwind

colors: {
  custom: {
    50: '#9a91ef',
    500: '#6366e7',
    950: '#000000',
  },
}

SCSS

$custom: #6366e7;
$custom-light: #9a91ef;
$custom-dark: #000000;

JSON

{
  "hex": "#6366e7",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 231
  },
  "hsl": {
    "h": 238.636,
    "s": 73.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.578,
    "c": 0.191,
    "h": 277.6
  },
  "luminance": 0.17925
}

Semantic roles & 50–950 ramp

primary

#6366E7

secondary

#EAE9BC

accent

#D110D5

background

#FAF8FE

surface

#F4F0FD

border

#CECBD5

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6366E7

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

Preview Lab → · Contrast checker → · Palette generator →