#6366F5#6366F5

#6366F5 is a mid, highly saturated blue. Relative luminance 0.187; OKLCH L 58.8% C 0.209 H 276.9°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#6366F5
RGB	rgb(99, 102, 245)
HSL	hsl(239, 88%, 67%)
HSV	hsv(239, 60%, 96%)
CMYK	cmyk(59.6%, 58.4%, 0%, 3.9%)
CIE-LAB	lab(50.39, 39.96, -72.25)
CIE-LCH	lch(50.39, 82.57, 298.95°)
OKLab	oklab(58.84% 0.0252 -0.2077)
OKLCH	oklch(58.84% 0.209 276.9)
XYZ	xyz(26.3731, 18.7460, 88.5971)
Luminance	0.1875 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366F5 #F5F263

analogous

#63AFF5 #6366F5 #A963F5

triadic

#6366F5 #F56366 #66F563

tetradic

#6366F5 #F563AF #F5F263 #63F5A9

square

#6366F5 #F563AF #F5F263 #63F5A9

split-complementary

#6366F5 #F5A963 #AFF563

monochromatic

#0D11D0 #292EF1 #6366F5 #9D9EF9 #D6D7FC

Accessibility & contrast

On white

4.42

#6366F5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#6366F5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366F5

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366F5	#FFFFFF	#000000	##000000
##6366F5	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007EFA

Deuteranopia (green-blind)

#0072F2

Tritanopia (blue-blind)

#0089A4

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #6366f5;
/* rgb */ color: rgb(99, 102, 245);
/* oklch */ color: oklch(58.8% 0.209 276.9);

Tailwind

colors: {
  custom: {
    50: '#9c92f9',
    500: '#6366f5',
    950: '#000000',
  },
}

SCSS

$custom: #6366f5;
$custom-light: #9c92f9;
$custom-dark: #000000;

JSON

{
  "hex": "#6366f5",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 245
  },
  "hsl": {
    "h": 238.767,
    "s": 87.952,
    "l": 67.451
  },
  "oklch": {
    "l": 0.58843,
    "c": 0.20921,
    "h": 276.9
  },
  "luminance": 0.18748
}

Semantic roles & 50–950 ramp

primary

#6366F5

secondary

#F1F0C3

accent

#E001E5

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6366F5

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

Preview Lab → · Contrast checker → · Palette generator →