#6366F4#6366F4

#6366F4 is a mid, highly saturated blue. Relative luminance 0.187; OKLCH L 58.8% C 0.208 H 277.0°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#6366F4
RGB	rgb(99, 102, 244)
HSL	hsl(239, 87%, 67%)
HSV	hsv(239, 59%, 96%)
CMYK	cmyk(59.4%, 58.2%, 0%, 4.3%)
CIE-LAB	lab(50.32, 39.64, -71.81)
CIE-LCH	lch(50.32, 82.03, 298.90°)
OKLab	oklab(58.77% 0.0253 -0.2064)
OKLCH	oklch(58.77% 0.208 277)
XYZ	xyz(26.2208, 18.6851, 87.7952)
Luminance	0.1869 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366F4 #F4F163

analogous

#63AEF4 #6366F4 #A963F4

triadic

#6366F4 #F46366 #66F463

tetradic

#6366F4 #F463AE #F4F163 #63F4A9

square

#6366F4 #F463AE #F4F163 #63F4A9

split-complementary

#6366F4 #F4A963 #AEF463

monochromatic

#0F12CE #2A2EF0 #6366F4 #9C9EF8 #D5D6FC

Accessibility & contrast

On white

4.43

#6366F4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#6366F4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366F4

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366F4	#FFFFFF	#000000	##000000
##6366F4	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007EF9

Deuteranopia (green-blind)

#0072F1

Tritanopia (blue-blind)

#0088A3

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #6366f4;
/* rgb */ color: rgb(99, 102, 244);
/* oklch */ color: oklch(58.8% 0.208 277.0);

Tailwind

colors: {
  custom: {
    50: '#9c92f9',
    500: '#6366f4',
    950: '#000000',
  },
}

SCSS

$custom: #6366f4;
$custom-light: #9c92f9;
$custom-dark: #000000;

JSON

{
  "hex": "#6366f4",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 244
  },
  "hsl": {
    "h": 238.759,
    "s": 86.826,
    "l": 67.255
  },
  "oklch": {
    "l": 0.58767,
    "c": 0.20793,
    "h": 277
  },
  "luminance": 0.18687
}

Semantic roles & 50–950 ramp

primary

#6366F4

secondary

#F0EFC3

accent

#DF02E3

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6366F4

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

Preview Lab → · Contrast checker → · Palette generator →