#6366F0#6366F0

#6366F0 is a mid, highly saturated blue. Relative luminance 0.184; OKLCH L 58.5% C 0.203 H 277.2°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#6366F0
RGB	rgb(99, 102, 240)
HSL	hsl(239, 82%, 66%)
HSV	hsv(239, 59%, 94%)
CMYK	cmyk(58.8%, 57.5%, 0%, 5.9%)
CIE-LAB	lab(50.03, 38.37, -70.04)
CIE-LCH	lch(50.03, 79.86, 298.71°)
OKLab	oklab(58.47% 0.0253 -0.2012)
OKLCH	oklch(58.47% 0.203 277.2)
XYZ	xyz(25.6201, 18.4448, 84.6313)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366F0 #F0ED63

analogous

#63ADF0 #6366F0 #A763F0

triadic

#6366F0 #F06366 #66F063

tetradic

#6366F0 #F063AD #F0ED63 #63F0A7

square

#6366F0 #F063AD #F0ED63 #63F0A7

split-complementary

#6366F0 #F0A763 #ADF063

monochromatic

#1317C6 #2B2FEB #6366F0 #9B9DF5 #D3D4FB

Accessibility & contrast

On white

4.48

#6366F0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#6366F0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366F0

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366F0	#FFFFFF	#000000	##000000
##6366F0	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007DF5

Deuteranopia (green-blind)

#0071ED

Tritanopia (blue-blind)

#0087A1

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #6366f0;
/* rgb */ color: rgb(99, 102, 240);
/* oklch */ color: oklch(58.5% 0.203 277.2);

Tailwind

colors: {
  custom: {
    50: '#9c91f6',
    500: '#6366f0',
    950: '#000000',
  },
}

SCSS

$custom: #6366f0;
$custom-light: #9c91f6;
$custom-dark: #000000;

JSON

{
  "hex": "#6366f0",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 240
  },
  "hsl": {
    "h": 238.723,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.58465,
    "c": 0.20276,
    "h": 277.2
  },
  "luminance": 0.18447
}

Semantic roles & 50–950 ramp

primary

#6366F0

secondary

#EEEDC1

accent

#DA07DF

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6366F0

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

Preview Lab → · Contrast checker → · Palette generator →