#643F72#643F72

#643F72 is a dark, moderate purple. Relative luminance 0.075; OKLCH L 43.2% C 0.092 H 316.3°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#643F72
RGB	rgb(100, 63, 114)
HSL	hsl(284, 29%, 35%)
HSV	hsv(284, 45%, 45%)
CMYK	cmyk(12.3%, 44.7%, 0%, 55.3%)
CIE-LAB	lab(32.87, 25.92, -23.07)
CIE-LCH	lch(32.87, 34.70, 318.34°)
OKLab	oklab(43.19% 0.0666 -0.0637)
OKLCH	oklch(43.19% 0.092 316.3)
XYZ	xyz(10.0698, 7.4795, 16.8296)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F72 #4D723F

analogous

#4A3F72 #643F72 #723F67

triadic

#643F72 #72643F #3F7264

tetradic

#643F72 #724A3F #4D723F #3F6772

square

#643F72 #724A3F #4D723F #3F6772

split-complementary

#643F72 #67723F #3F724A

monochromatic

#1F1323 #41294B #643F72 #875599 #A377B4

Accessibility & contrast

On white

8.41

#643F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#643F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F72

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F72	#FFFFFF	#000000	##FFFFFF
##643F72	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#364B74

Deuteranopia (green-blind)

#404E71

Tritanopia (blue-blind)

#644653

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643f72;
/* rgb */ color: rgb(100, 63, 114);
/* oklch */ color: oklch(43.2% 0.092 316.3);

Tailwind

colors: {
  custom: {
    50: '#91759a',
    500: '#643f72',
    950: '#000000',
  },
}

SCSS

$custom: #643f72;
$custom-light: #91759a;
$custom-dark: #000000;

JSON

{
  "hex": "#643f72",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 114
  },
  "hsl": {
    "h": 283.529,
    "s": 28.814,
    "l": 34.706
  },
  "oklch": {
    "l": 0.43189,
    "c": 0.09219,
    "h": 316.3
  },
  "luminance": 0.07479
}

Semantic roles & 50–950 ramp

primary

#643F72

secondary

#7B9F6E

accent

#C5637E

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F72

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

Preview Lab → · Contrast checker → · Palette generator →