#643C88#643C88

#643C88 is a dark, vivid violet. Relative luminance 0.077; OKLCH L 44.0% C 0.125 H 306.2°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX#643C88
RGBrgb(100, 60, 136)
HSLhsl(272, 39%, 38%)
HSVhsv(272, 56%, 53%)
CMYKcmyk(26.5%, 55.9%, 0%, 46.7%)
CIE-LABlab(33.39, 33.07, -35.96)
CIE-LCHlch(33.39, 48.86, 312.60°)
OKLaboklab(43.97% 0.0741 -0.1011)
OKLCHoklch(43.97% 0.125 306.2)
XYZxyz(11.3144, 7.7187, 24.1816)
Luminance0.0772 (WCAG relative)
Temperaturecool
Familyviolet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#643C88 #60883C
analogous
#3E3C88 #643C88 #883C86
triadic
#643C88 #88643C #3C8864
tetradic
#643C88 #883E3C #60883C #3C8688
square
#643C88 #883E3C #60883C #3C8688
split-complementary
#643C88 #86883C #3C883E
monochromatic
#261733 #45295E #643C88 #8350B2 #A17AC4

Accessibility & contrast

On white

8.26
#643C88 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.54
#643C88 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C88
8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##643C88#FFFFFF#000000##FFFFFF
##643C881.008.262.548.26
#FFFFFF8.261.0021.001.00
#0000002.5421.001.0021.00
##FFFFFF8.261.0021.001.00

Color blindness preview

Protanopia (red-blind)
#234D8B
Deuteranopia (green-blind)
#304F86
Tritanopia (blue-blind)
#5E4A5C
Achromatopsia (no color)
#4F4F4F

Design tokens & code

CSS
--color: #643c88;
/* rgb */ color: rgb(100, 60, 136);
/* oklch */ color: oklch(44.0% 0.125 306.2);
Tailwind
colors: {
  custom: {
    50: '#9273ab',
    500: '#643c88',
    950: '#000000',
  },
}
SCSS
$custom: #643c88;
$custom-light: #9273ab;
$custom-dark: #000000;
JSON
{
  "hex": "#643c88",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 136
  },
  "hsl": {
    "h": 271.579,
    "s": 38.776,
    "l": 38.431
  },
  "oklch": {
    "l": 0.43967,
    "c": 0.12536,
    "h": 306.2
  },
  "luminance": 0.07719
}

Semantic roles & 50–950 ramp

primary
#643C88
secondary
#8EAE72
accent
#CF5991
background
#F9F7FA
surface
#F1EDF4
border
#CBC8CE
text
#0D0810
muted
#7E7B7F

Preview Lab

Preview with #643C88

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

Preview Lab → · Contrast checker → · Palette generator →

#643C88 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva