#643F8A#643F8A

#643F8A is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.6% C 0.123 H 304.7°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#643F8A
RGB	rgb(100, 63, 138)
HSL	hsl(270, 37%, 39%)
HSV	hsv(270, 54%, 54%)
CMYK	cmyk(27.5%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(34.19, 31.82, -35.92)
CIE-LCH	lch(34.19, 47.99, 311.54°)
OKLab	oklab(44.6% 0.0699 -0.101)
OKLCH	oklch(44.6% 0.123 304.7)
XYZ	xyz(11.6195, 8.0994, 24.9910)
Luminance	0.0810 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F8A #658A3F

analogous

#3F408A #643F8A #8A3F8A

triadic

#643F8A #8A643F #3F8A64

tetradic

#643F8A #8A3F40 #658A3F #3F8A8A

square

#643F8A #8A3F40 #658A3F #3F8A8A

split-complementary

#643F8A #8A8A3F #408A3F

monochromatic

#271936 #462C60 #643F8A #8255B1 #A17FC5

Accessibility & contrast

On white

8.02

#643F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#643F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F8A

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F8A	#FFFFFF	#000000	##FFFFFF
##643F8A	1.00	8.02	2.62	8.02
#FFFFFF	8.02	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264F8D

Deuteranopia (green-blind)

#325088

Tritanopia (blue-blind)

#5E4D5E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643f8a;
/* rgb */ color: rgb(100, 63, 138);
/* oklch */ color: oklch(44.6% 0.123 304.7);

Tailwind

colors: {
  custom: {
    50: '#9275ac',
    500: '#643f8a',
    950: '#000000',
  },
}

SCSS

$custom: #643f8a;
$custom-light: #9275ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643f8a",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 269.6,
    "s": 37.313,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44595,
    "c": 0.12288,
    "h": 304.7
  },
  "luminance": 0.08099
}

Semantic roles & 50–950 ramp

primary

#643F8A

secondary

#93AF76

accent

#CD5B95

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643F8A

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

Preview Lab → · Contrast checker → · Palette generator →