#663BD3#663BD3

#663BD3 is a mid, highly saturated violet. Relative luminance 0.107; OKLCH L 49.8% C 0.217 H 288.9°. Best body text is #FFFFFF at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#663BD3
RGB	rgb(102, 59, 211)
HSL	hsl(257, 63%, 53%)
HSV	hsv(257, 72%, 83%)
CMYK	cmyk(51.7%, 72%, 0%, 17.3%)
CIE-LAB	lab(38.99, 54.27, -71.56)
CIE-LCH	lch(38.99, 89.81, 307.18°)
OKLab	oklab(49.81% 0.0704 -0.2056)
OKLCH	oklch(49.81% 0.217 288.9)
XYZ	xyz(18.7979, 10.6550, 62.6815)
Luminance	0.1066 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 3.33

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663BD3 #A8D33B

analogous

#3B5CD3 #663BD3 #B23BD3

triadic

#663BD3 #D3663B #3BD366

tetradic

#663BD3 #D33B5C #A8D33B #3BD3B2

square

#663BD3 #D33B5C #A8D33B #3BD3B2

split-complementary

#663BD3 #D3B23B #5CD33B

monochromatic

#361B79 #4C26AB #663BD3 #8D6DDE #B49FE9

Accessibility & contrast

On white

6.71

#663BD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#663BD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #663BD3

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663BD3	#FFFFFF	#000000	##FFFFFF
##663BD3	1.00	6.71	3.13	6.71
#FFFFFF	6.71	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD7

Deuteranopia (green-blind)

#0058D0

Tritanopia (blue-blind)

#3D6483

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #663bd3;
/* rgb */ color: rgb(102, 59, 211);
/* oklch */ color: oklch(49.8% 0.217 288.9);

Tailwind

colors: {
  custom: {
    50: '#9c75e2',
    500: '#663bd3',
    950: '#000000',
  },
}

SCSS

$custom: #663bd3;
$custom-light: #9c75e2;
$custom-dark: #000000;

JSON

{
  "hex": "#663bd3",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 211
  },
  "hsl": {
    "h": 256.974,
    "s": 63.333,
    "l": 52.941
  },
  "oklch": {
    "l": 0.49812,
    "c": 0.21733,
    "h": 288.9
  },
  "luminance": 0.10656
}

Semantic roles & 50–950 ramp

primary

#663BD3

secondary

#C3D694

accent

#E641B8

background

#FAF7FE

surface

#F4EDFC

border

#CEC8D5

text

#0F0915

muted

#7F7B84

Preview Lab

Preview with #663BD3

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

Preview Lab → · Contrast checker → · Palette generator →