#6366F8#6366F8

#6366F8 is a mid, highly saturated blue. Relative luminance 0.189; OKLCH L 59.1% C 0.213 H 276.8°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#6366F8
RGB	rgb(99, 102, 248)
HSL	hsl(239, 91%, 68%)
HSV	hsv(239, 60%, 97%)
CMYK	cmyk(60.1%, 58.9%, 0%, 2.7%)
CIE-LAB	lab(50.61, 40.92, -73.57)
CIE-LCH	lch(50.61, 84.18, 299.08°)
OKLab	oklab(59.07% 0.0252 -0.2116)
OKLCH	oklch(59.07% 0.213 276.8)
XYZ	xyz(26.8348, 18.9306, 91.0286)
Luminance	0.1893 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366F8 #F8F563

analogous

#63B0F8 #6366F8 #AA63F8

triadic

#6366F8 #F86366 #66F863

tetradic

#6366F8 #F863B0 #F8F563 #63F8AA

square

#6366F8 #F863B0 #F8F563 #63F8AA

split-complementary

#6366F8 #F8AA63 #B0F863

monochromatic

#0A0ED7 #282DF5 #6366F8 #9E9FFB #D8D9FD

Accessibility & contrast

On white

4.39

#6366F8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#6366F8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366F8

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366F8	#FFFFFF	#000000	##000000
##6366F8	1.00	4.39	4.79	4.79
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007FFD

Deuteranopia (green-blind)

#0072F5

Tritanopia (blue-blind)

#008AA5

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #6366f8;
/* rgb */ color: rgb(99, 102, 248);
/* oklch */ color: oklch(59.1% 0.213 276.8);

Tailwind

colors: {
  custom: {
    50: '#9d92fc',
    500: '#6366f8',
    950: '#000000',
  },
}

SCSS

$custom: #6366f8;
$custom-light: #9d92fc;
$custom-dark: #000000;

JSON

{
  "hex": "#6366f8",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 248
  },
  "hsl": {
    "h": 238.792,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.59071,
    "c": 0.21305,
    "h": 276.8
  },
  "luminance": 0.18933
}

Semantic roles & 50–950 ramp

primary

#6366F8

secondary

#F2F1C5

accent

#E100E6

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100D18

muted

#7F7D86

Preview Lab

Preview with #6366F8

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

Preview Lab → · Contrast checker → · Palette generator →