#643C83#643C83

#643C83 is a dark, moderate violet. Relative luminance 0.076; OKLCH L 43.6% C 0.119 H 308.3°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#643C83
RGB	rgb(100, 60, 131)
HSL	hsl(274, 37%, 37%)
HSV	hsv(274, 54%, 51%)
CMYK	cmyk(23.7%, 54.2%, 0%, 48.6%)
CIE-LAB	lab(33.09, 31.82, -33.34)
CIE-LCH	lch(33.09, 46.09, 313.66°)
OKLab	oklab(43.65% 0.0737 -0.0935)
OKLCH	oklch(43.65% 0.119 308.3)
XYZ	xyz(10.9673, 7.5799, 22.3536)
Luminance	0.0758 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C83 #5B833C

analogous

#413C83 #643C83 #833C7F

triadic

#643C83 #83643C #3C8364

tetradic

#643C83 #83413C #5B833C #3C7F83

square

#643C83 #83413C #5B833C #3C7F83

split-complementary

#643C83 #7F833C #3C8341

monochromatic

#24162F #442959 #643C83 #844FAD #A178C1

Accessibility & contrast

On white

8.35

#643C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#643C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C83

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C83	#FFFFFF	#000000	##FFFFFF
##643C83	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274C85

Deuteranopia (green-blind)

#344E81

Tritanopia (blue-blind)

#604859

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643c83;
/* rgb */ color: rgb(100, 60, 131);
/* oklch */ color: oklch(43.6% 0.119 308.3);

Tailwind

colors: {
  custom: {
    50: '#9273a7',
    500: '#643c83',
    950: '#000000',
  },
}

SCSS

$custom: #643c83;
$custom-light: #9273a7;
$custom-dark: #000000;

JSON

{
  "hex": "#643c83",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 131
  },
  "hsl": {
    "h": 273.803,
    "s": 37.173,
    "l": 37.451
  },
  "oklch": {
    "l": 0.4365,
    "c": 0.11905,
    "h": 308.3
  },
  "luminance": 0.0758
}

Semantic roles & 50–950 ramp

primary

#643C83

secondary

#8AAB70

accent

#CD5B8D

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643C83

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

Preview Lab → · Contrast checker → · Palette generator →