#643B71#643B71

#643B71 is a dark, moderate purple. Relative luminance 0.070; OKLCH L 42.4% C 0.099 H 317.7°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#643B71
RGB	rgb(100, 59, 113)
HSL	hsl(286, 31%, 34%)
HSV	hsv(286, 48%, 44%)
CMYK	cmyk(11.5%, 47.8%, 0%, 55.7%)
CIE-LAB	lab(31.87, 28.10, -24.00)
CIE-LCH	lch(31.87, 36.95, 319.50°)
OKLab	oklab(42.43% 0.0728 -0.0664)
OKLCH	oklch(42.43% 0.099 317.7)
XYZ	xyz(9.7997, 7.0298, 16.4603)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B71 #48713B

analogous

#493B71 #643B71 #713B63

triadic

#643B71 #71643B #3B7164

tetradic

#643B71 #71493B #48713B #3B6371

square

#643B71 #71493B #48713B #3B6371

split-complementary

#643B71 #63713B #3B7149

monochromatic

#1D1121 #402649 #643B71 #885099 #A571B5

Accessibility & contrast

On white

8.73

#643B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#643B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B71

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B71	#FFFFFF	#000000	##FFFFFF
##643B71	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324873

Deuteranopia (green-blind)

#3D4C6F

Tritanopia (blue-blind)

#644250

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #643b71;
/* rgb */ color: rgb(100, 59, 113);
/* oklch */ color: oklch(42.4% 0.099 317.7);

Tailwind

colors: {
  custom: {
    50: '#91729a',
    500: '#643b71',
    950: '#000000',
  },
}

SCSS

$custom: #643b71;
$custom-light: #91729a;
$custom-dark: #000000;

JSON

{
  "hex": "#643b71",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 113
  },
  "hsl": {
    "h": 285.556,
    "s": 31.395,
    "l": 33.725
  },
  "oklch": {
    "l": 0.42425,
    "c": 0.09854,
    "h": 317.7
  },
  "luminance": 0.0703
}

Semantic roles & 50–950 ramp

primary

#643B71

secondary

#769F69

accent

#C86079

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643B71

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

Preview Lab → · Contrast checker → · Palette generator →