#643C8B#643C8B

#643C8B is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.2% C 0.129 H 305.1°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#643C8B
RGB	rgb(100, 60, 139)
HSL	hsl(270, 40%, 39%)
HSV	hsv(270, 57%, 55%)
CMYK	cmyk(28.1%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(33.57, 33.84, -37.52)
CIE-LCH	lch(33.57, 50.52, 312.05°)
OKLab	oklab(44.16% 0.0742 -0.1057)
OKLCH	oklch(44.16% 0.129 305.1)
XYZ	xyz(11.5306, 7.8052, 25.3202)
Luminance	0.0780 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C8B #638B3C

analogous

#3D3C8B #643C8B #8B3C8B

triadic

#643C8B #8B643C #3C8B64

tetradic

#643C8B #8B3D3C #638B3C #3C8B8B

square

#643C8B #8B3D3C #638B3C #3C8B8B

split-complementary

#643C8B #8B8B3C #3C8B3D

monochromatic

#261736 #452A60 #643C8B #8351B4 #A17BC6

Accessibility & contrast

On white

8.20

#643C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C8B

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C8B	#FFFFFF	#000000	##FFFFFF
##643C8B	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204E8E

Deuteranopia (green-blind)

#2E4F89

Tritanopia (blue-blind)

#5D4B5D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643c8b;
/* rgb */ color: rgb(100, 60, 139);
/* oklch */ color: oklch(44.2% 0.129 305.1);

Tailwind

colors: {
  custom: {
    50: '#9373ad',
    500: '#643c8b',
    950: '#000000',
  },
}

SCSS

$custom: #643c8b;
$custom-light: #9373ad;
$custom-dark: #000000;

JSON

{
  "hex": "#643c8b",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 270.38,
    "s": 39.698,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44161,
    "c": 0.12915,
    "h": 305.1
  },
  "luminance": 0.07805
}

Semantic roles & 50–950 ramp

primary

#643C8B

secondary

#91B073

accent

#D05893

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643C8B

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

Preview Lab → · Contrast checker → · Palette generator →