#643C71#643C71

#643C71 is a dark, moderate purple. Relative luminance 0.071; OKLCH L 42.6% C 0.097 H 317.5°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#643C71
RGB	rgb(100, 60, 113)
HSL	hsl(285, 31%, 34%)
HSV	hsv(285, 47%, 44%)
CMYK	cmyk(11.5%, 46.9%, 0%, 55.7%)
CIE-LAB	lab(32.11, 27.50, -23.63)
CIE-LCH	lch(32.11, 36.26, 319.33°)
OKLab	oklab(42.6% 0.0712 -0.0653)
OKLCH	oklch(42.6% 0.097 317.5)
XYZ	xyz(9.8516, 7.1336, 16.4776)
Luminance	0.0713 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C71 #49713C

analogous

#4A3C71 #643C71 #713C64

triadic

#643C71 #71643C #3C7164

tetradic

#643C71 #714A3C #49713C #3C6471

square

#643C71 #714A3C #49713C #3C6471

split-complementary

#643C71 #64713C #3C714A

monochromatic

#1D1221 #412749 #643C71 #875199 #A473B5

Accessibility & contrast

On white

8.65

#643C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#643C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C71

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C71	#FFFFFF	#000000	##FFFFFF
##643C71	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334973

Deuteranopia (green-blind)

#3E4D6F

Tritanopia (blue-blind)

#644351

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643c71;
/* rgb */ color: rgb(100, 60, 113);
/* oklch */ color: oklch(42.6% 0.097 317.5);

Tailwind

colors: {
  custom: {
    50: '#91739a',
    500: '#643c71',
    950: '#000000',
  },
}

SCSS

$custom: #643c71;
$custom-light: #91739a;
$custom-dark: #000000;

JSON

{
  "hex": "#643c71",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 113
  },
  "hsl": {
    "h": 285.283,
    "s": 30.636,
    "l": 33.922
  },
  "oklch": {
    "l": 0.426,
    "c": 0.09665,
    "h": 317.5
  },
  "luminance": 0.07133
}

Semantic roles & 50–950 ramp

primary

#643C71

secondary

#779F6A

accent

#C7617A

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643C71

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

Preview Lab → · Contrast checker → · Palette generator →