#663FCB#663FCB

#663FCB is a mid, highly saturated violet. Relative luminance 0.107; OKLCH L 49.6% C 0.204 H 289.7°. Best body text is #FFFFFF at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#663FCB
RGB	rgb(102, 63, 203)
HSL	hsl(257, 57%, 52%)
HSV	hsv(257, 69%, 80%)
CMYK	cmyk(49.8%, 69%, 0%, 20.4%)
CIE-LAB	lab(39.05, 50.00, -66.83)
CIE-LCH	lch(39.05, 83.47, 306.80°)
OKLab	oklab(49.65% 0.0685 -0.1918)
OKLCH	oklch(49.65% 0.204 289.7)
XYZ	xyz(18.0334, 10.6908, 57.6017)
Luminance	0.1069 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663FCB #A4CB3F

analogous

#3F5ECB #663FCB #AC3FCB

triadic

#663FCB #CB663F #3FCB66

tetradic

#663FCB #CB3F5E #A4CB3F #3FCBAC

square

#663FCB #CB3F5E #A4CB3F #3FCBAC

split-complementary

#663FCB #CBAC3F #5ECB3F

monochromatic

#361F71 #4C2CA1 #663FCB #8C6FD8 #B39FE5

Accessibility & contrast

On white

6.69

#663FCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#663FCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #663FCB

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663FCB	#FFFFFF	#000000	##FFFFFF
##663FCB	1.00	6.69	3.14	6.69
#FFFFFF	6.69	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FCF

Deuteranopia (green-blind)

#0059C8

Tritanopia (blue-blind)

#436380

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #663fcb;
/* rgb */ color: rgb(102, 63, 203);
/* oklch */ color: oklch(49.6% 0.204 289.7);

Tailwind

colors: {
  custom: {
    50: '#9a77dc',
    500: '#663fcb',
    950: '#000000',
  },
}

SCSS

$custom: #663fcb;
$custom-light: #9a77dc;
$custom-dark: #000000;

JSON

{
  "hex": "#663fcb",
  "rgb": {
    "r": 102,
    "g": 63,
    "b": 203
  },
  "hsl": {
    "h": 256.714,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.49649,
    "c": 0.20362,
    "h": 289.7
  },
  "luminance": 0.10692
}

Semantic roles & 50–950 ramp

primary

#663FCB

secondary

#C0D194

accent

#E147B6

background

#FAF7FD

surface

#F3EDFB

border

#CDC8D4

text

#0F0915

muted

#7F7B83

Preview Lab

Preview with #663FCB

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

Preview Lab → · Contrast checker → · Palette generator →