#643F71#643F71

#643F71 is a dark, moderate purple. Relative luminance 0.075; OKLCH L 43.1% C 0.091 H 316.9°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#643F71
RGB	rgb(100, 63, 113)
HSL	hsl(284, 28%, 35%)
HSV	hsv(284, 44%, 44%)
CMYK	cmyk(11.5%, 44.2%, 0%, 55.7%)
CIE-LAB	lab(32.83, 25.69, -22.51)
CIE-LCH	lch(32.83, 34.16, 318.77°)
OKLab	oklab(43.14% 0.0664 -0.0621)
OKLCH	oklch(43.14% 0.091 316.9)
XYZ	xyz(10.0132, 7.4569, 16.5314)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F71 #4C713F

analogous

#4B3F71 #643F71 #713F65

triadic

#643F71 #71643F #3F7164

tetradic

#643F71 #714B3F #4C713F #3F6571

square

#643F71 #714B3F #4C713F #3F6571

split-complementary

#643F71 #65713F #3F714B

monochromatic

#1E1322 #41294A #643F71 #875598 #A477B3

Accessibility & contrast

On white

8.43

#643F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#643F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F71

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F71	#FFFFFF	#000000	##FFFFFF
##643F71	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#374B73

Deuteranopia (green-blind)

#404E70

Tritanopia (blue-blind)

#644652

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643f71;
/* rgb */ color: rgb(100, 63, 113);
/* oklch */ color: oklch(43.1% 0.091 316.9);

Tailwind

colors: {
  custom: {
    50: '#91759a',
    500: '#643f71',
    950: '#000000',
  },
}

SCSS

$custom: #643f71;
$custom-light: #91759a;
$custom-dark: #000000;

JSON

{
  "hex": "#643f71",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 113
  },
  "hsl": {
    "h": 284.4,
    "s": 28.409,
    "l": 34.51
  },
  "oklch": {
    "l": 0.43136,
    "c": 0.09094,
    "h": 316.9
  },
  "luminance": 0.07457
}

Semantic roles & 50–950 ramp

primary

#643F71

secondary

#7A9E6E

accent

#C5637C

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F71

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

Preview Lab → · Contrast checker → · Palette generator →