#643B83#643B83

#643B83 is a dark, vivid violet. Relative luminance 0.075; OKLCH L 43.5% C 0.121 H 308.5°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#643B83
RGB	rgb(100, 59, 131)
HSL	hsl(274, 38%, 37%)
HSV	hsv(274, 55%, 51%)
CMYK	cmyk(23.7%, 55%, 0%, 48.6%)
CIE-LAB	lab(32.87, 32.40, -33.70)
CIE-LCH	lch(32.87, 46.75, 313.87°)
OKLab	oklab(43.48% 0.0752 -0.0945)
OKLCH	oklch(43.48% 0.121 308.5)
XYZ	xyz(10.9154, 7.4761, 22.3363)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B83 #5A833B

analogous

#403B83 #643B83 #833B7E

triadic

#643B83 #83643B #3B8364

tetradic

#643B83 #83403B #5A833B #3B7E83

square

#643B83 #83403B #5A833B #3B7E83

split-complementary

#643B83 #7E833B #3B8340

monochromatic

#24152F #442859 #643B83 #844EAD #A177C2

Accessibility & contrast

On white

8.42

#643B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#643B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B83

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B83	#FFFFFF	#000000	##FFFFFF
##643B83	1.00	8.42	2.50	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264C85

Deuteranopia (green-blind)

#334E81

Tritanopia (blue-blind)

#604859

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643b83;
/* rgb */ color: rgb(100, 59, 131);
/* oklch */ color: oklch(43.5% 0.121 308.5);

Tailwind

colors: {
  custom: {
    50: '#9272a7',
    500: '#643b83',
    950: '#000000',
  },
}

SCSS

$custom: #643b83;
$custom-light: #9272a7;
$custom-dark: #000000;

JSON

{
  "hex": "#643b83",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 131
  },
  "hsl": {
    "h": 274.167,
    "s": 37.895,
    "l": 37.255
  },
  "oklch": {
    "l": 0.43484,
    "c": 0.12077,
    "h": 308.5
  },
  "luminance": 0.07476
}

Semantic roles & 50–950 ramp

primary

#643B83

secondary

#89AB6F

accent

#CE5A8C

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643B83

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

Preview Lab → · Contrast checker → · Palette generator →