#643B7A#643B7A

#643B7A is a dark, moderate violet. Relative luminance 0.072; OKLCH L 42.9% C 0.110 H 312.7°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#643B7A
RGB	rgb(100, 59, 122)
HSL	hsl(279, 35%, 35%)
HSV	hsv(279, 52%, 48%)
CMYK	cmyk(18%, 51.6%, 0%, 52.2%)
CIE-LAB	lab(32.35, 30.21, -28.91)
CIE-LCH	lch(32.35, 41.81, 316.26°)
OKLab	oklab(42.94% 0.0742 -0.0806)
OKLCH	oklch(42.94% 0.11 312.7)
XYZ	xyz(10.3317, 7.2426, 19.2623)
Luminance	0.0724 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B7A #517A3B

analogous

#443B7A #643B7A #7A3B70

triadic

#643B7A #7A643B #3B7A64

tetradic

#643B7A #7A443B #517A3B #3B707A

square

#643B7A #7A443B #517A3B #3B707A

split-complementary

#643B7A #707A3B #3B7A44

monochromatic

#201327 #422751 #643B7A #864FA3 #A374BC

Accessibility & contrast

On white

8.58

#643B7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#643B7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B7A

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B7A	#FFFFFF	#000000	##FFFFFF
##643B7A	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4A7C

Deuteranopia (green-blind)

#384D78

Tritanopia (blue-blind)

#624555

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643b7a;
/* rgb */ color: rgb(100, 59, 122);
/* oklch */ color: oklch(42.9% 0.110 312.7);

Tailwind

colors: {
  custom: {
    50: '#9272a1',
    500: '#643b7a',
    950: '#000000',
  },
}

SCSS

$custom: #643b7a;
$custom-light: #9272a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643b7a",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 122
  },
  "hsl": {
    "h": 279.048,
    "s": 34.807,
    "l": 35.49
  },
  "oklch": {
    "l": 0.42937,
    "c": 0.10956,
    "h": 312.7
  },
  "luminance": 0.07242
}

Semantic roles & 50–950 ramp

primary

#643B7A

secondary

#80A56C

accent

#CB5D83

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643B7A

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

Preview Lab → · Contrast checker → · Palette generator →