#643A8B#643A8B

#643A8B is a dark, vivid violet. Relative luminance 0.076; OKLCH L 43.8% C 0.132 H 305.5°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#643A8B
RGB	rgb(100, 58, 139)
HSL	hsl(271, 41%, 39%)
HSV	hsv(271, 58%, 55%)
CMYK	cmyk(28.1%, 58.3%, 0%, 45.5%)
CIE-LAB	lab(33.13, 34.99, -38.22)
CIE-LCH	lch(33.13, 51.82, 312.48°)
OKLab	oklab(43.84% 0.077 -0.1077)
OKLCH	oklch(43.84% 0.132 305.5)
XYZ	xyz(11.4278, 7.5996, 25.2859)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A8B #618B3A

analogous

#3B3A8B #643A8B #8B3A89

triadic

#643A8B #8B643A #3A8B64

tetradic

#643A8B #8B3B3A #618B3A #3A898B

square

#643A8B #8B3B3A #618B3A #3A898B

split-complementary

#643A8B #898B3A #3A8B3B

monochromatic

#261635 #452860 #643A8B #834DB5 #A179C7

Accessibility & contrast

On white

8.33

#643A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#643A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A8B

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A8B	#FFFFFF	#000000	##FFFFFF
##643A8B	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4D8E

Deuteranopia (green-blind)

#2B4E89

Tritanopia (blue-blind)

#5D495D

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643a8b;
/* rgb */ color: rgb(100, 58, 139);
/* oklch */ color: oklch(43.8% 0.132 305.5);

Tailwind

colors: {
  custom: {
    50: '#9372ad',
    500: '#643a8b',
    950: '#000000',
  },
}

SCSS

$custom: #643a8b;
$custom-light: #9372ad;
$custom-dark: #000000;

JSON

{
  "hex": "#643a8b",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 139
  },
  "hsl": {
    "h": 271.111,
    "s": 41.117,
    "l": 38.627
  },
  "oklch": {
    "l": 0.43839,
    "c": 0.13242,
    "h": 305.5
  },
  "luminance": 0.076
}

Semantic roles & 50–950 ramp

primary

#643A8B

secondary

#8FB071

accent

#D15792

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A8B

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

Preview Lab → · Contrast checker → · Palette generator →