#643F74#643F74

#643F74 is a dark, moderate purple. Relative luminance 0.075; OKLCH L 43.3% C 0.095 H 315.1°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#643F74
RGB	rgb(100, 63, 116)
HSL	hsl(282, 30%, 35%)
HSV	hsv(282, 46%, 45%)
CMYK	cmyk(13.8%, 45.7%, 0%, 54.5%)
CIE-LAB	lab(32.97, 26.39, -24.17)
CIE-LCH	lch(32.97, 35.79, 317.52°)
OKLab	oklab(43.3% 0.067 -0.0669)
OKLCH	oklch(43.3% 0.095 315.1)
XYZ	xyz(10.1849, 7.5255, 17.4357)
Luminance	0.0752 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F74 #4F743F

analogous

#4A3F74 #643F74 #743F69

triadic

#643F74 #74643F #3F7464

tetradic

#643F74 #744A3F #4F743F #3F6974

square

#643F74 #744A3F #4F743F #3F6974

split-complementary

#643F74 #69743F #3F744A

monochromatic

#201425 #42294C #643F74 #86559C #A378B6

Accessibility & contrast

On white

8.38

#643F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F74

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F74	#FFFFFF	#000000	##FFFFFF
##643F74	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#354B76

Deuteranopia (green-blind)

#3F4F72

Tritanopia (blue-blind)

#634654

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f74;
/* rgb */ color: rgb(100, 63, 116);
/* oklch */ color: oklch(43.3% 0.095 315.1);

Tailwind

colors: {
  custom: {
    50: '#91759c',
    500: '#643f74',
    950: '#000000',
  },
}

SCSS

$custom: #643f74;
$custom-light: #91759c;
$custom-dark: #000000;

JSON

{
  "hex": "#643f74",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 116
  },
  "hsl": {
    "h": 281.887,
    "s": 29.609,
    "l": 35.098
  },
  "oklch": {
    "l": 0.43296,
    "c": 0.09468,
    "h": 315.1
  },
  "luminance": 0.07525
}

Semantic roles & 50–950 ramp

primary

#643F74

secondary

#7EA06F

accent

#C66280

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F74

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

Preview Lab → · Contrast checker → · Palette generator →