#643C6B#643C6B

#643C6B is a dark, moderate purple. Relative luminance 0.070; OKLCH L 42.3% C 0.089 H 321.5°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX#643C6B
RGBrgb(100, 60, 107)
HSLhsl(291, 28%, 33%)
HSVhsv(291, 44%, 42%)
CMYKcmyk(6.5%, 43.9%, 0%, 58%)
CIE-LABlab(31.81, 26.15, -20.30)
CIE-LCHlch(31.81, 33.10, 322.18°)
OKLaboklab(42.28% 0.07 -0.0557)
OKLCHoklch(42.28% 0.089 321.5)
XYZxyz(9.5249, 7.0029, 14.7570)
Luminance0.0700 (WCAG relative)
Temperatureneutral
Familypurple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#643C6B #436B3C
analogous
#4C3C6B #643C6B #6B3C5A
triadic
#643C6B #6B643C #3C6B64
tetradic
#643C6B #6B4C3C #436B3C #3C5A6B
square
#643C6B #6B4C3C #436B3C #3C5A6B
split-complementary
#643C6B #5A6B3C #3C6B4C
monochromatic
#1B101D #3F2644 #643C6B #895292 #A672B0

Accessibility & contrast

On white

8.75
#643C6B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.40
#643C6B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C6B
8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##643C6B#FFFFFF#000000##FFFFFF
##643C6B1.008.752.408.75
#FFFFFF8.751.0021.001.00
#0000002.4021.001.0021.00
##FFFFFF8.751.0021.001.00

Color blindness preview

Protanopia (red-blind)
#36486D
Deuteranopia (green-blind)
#414C6A
Tritanopia (blue-blind)
#65424E
Achromatopsia (no color)
#4B4B4B

Design tokens & code

CSS
--color: #643c6b;
/* rgb */ color: rgb(100, 60, 107);
/* oklch */ color: oklch(42.3% 0.089 321.5);
Tailwind
colors: {
  custom: {
    50: '#917395',
    500: '#643c6b',
    950: '#000000',
  },
}
SCSS
$custom: #643c6b;
$custom-light: #917395;
$custom-dark: #000000;
JSON
{
  "hex": "#643c6b",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 107
  },
  "hsl": {
    "h": 291.064,
    "s": 28.144,
    "l": 32.745
  },
  "oklch": {
    "l": 0.42282,
    "c": 0.08949,
    "h": 321.5
  },
  "luminance": 0.07003
}

Semantic roles & 50–950 ramp

primary
#643C6B
secondary
#709A69
accent
#C46372
background
#F9F7F9
surface
#F1EDF1
border
#CBC8CB
text
#0D080D
muted
#7E7B7E

Preview Lab

Preview with #643C6B

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

Preview Lab → · Contrast checker → · Palette generator →

#643C6B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva