#643D6B#643D6B

#643D6B is a dark, moderate purple. Relative luminance 0.071; OKLCH L 42.5% C 0.088 H 321.3°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#643D6B
RGB	rgb(100, 61, 107)
HSL	hsl(291, 27%, 33%)
HSV	hsv(291, 43%, 42%)
CMYK	cmyk(6.5%, 43%, 0%, 58%)
CIE-LAB	lab(32.05, 25.55, -19.92)
CIE-LCH	lch(32.05, 32.40, 322.05°)
OKLab	oklab(42.46% 0.0683 -0.0547)
OKLCH	oklch(42.46% 0.088 321.3)
XYZ	xyz(9.5778, 7.1087, 14.7747)
Luminance	0.0711 (WCAG relative)
Temperature	neutral
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D6B #446B3D

analogous

#4D3D6B #643D6B #6B3D5B

triadic

#643D6B #6B643D #3D6B64

tetradic

#643D6B #6B4D3D #446B3D #3D5B6B

square

#643D6B #6B4D3D #446B3D #3D5B6B

split-complementary

#643D6B #5B6B3D #3D6B4D

monochromatic

#1B111D #402744 #643D6B #885392 #A673AF

Accessibility & contrast

On white

8.67

#643D6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#643D6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D6B

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D6B	#FFFFFF	#000000	##FFFFFF
##643D6B	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#37496D

Deuteranopia (green-blind)

#414D6A

Tritanopia (blue-blind)

#65424F

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #643d6b;
/* rgb */ color: rgb(100, 61, 107);
/* oklch */ color: oklch(42.5% 0.088 321.3);

Tailwind

colors: {
  custom: {
    50: '#917395',
    500: '#643d6b',
    950: '#000000',
  },
}

SCSS

$custom: #643d6b;
$custom-light: #917395;
$custom-dark: #000000;

JSON

{
  "hex": "#643d6b",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 107
  },
  "hsl": {
    "h": 290.87,
    "s": 27.381,
    "l": 32.941
  },
  "oklch": {
    "l": 0.42461,
    "c": 0.08754,
    "h": 321.3
  },
  "luminance": 0.07108
}

Semantic roles & 50–950 ramp

primary

#643D6B

secondary

#719A6A

accent

#C46473

background

#F9F7F9

surface

#F1EDF1

border

#CBC8CB

text

#0D080D

muted

#7E7B7E

Preview Lab

Preview with #643D6B

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

Preview Lab → · Contrast checker → · Palette generator →