#643D76#643D76

#643D76 is a dark, moderate purple. Relative luminance 0.074; OKLCH L 43.1% C 0.101 H 314.3°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#643D76
RGB	rgb(100, 61, 118)
HSL	hsl(281, 32%, 35%)
HSV	hsv(281, 48%, 46%)
CMYK	cmyk(15.3%, 48.3%, 0%, 53.7%)
CIE-LAB	lab(32.60, 28.07, -26.01)
CIE-LCH	lch(32.60, 38.26, 317.18°)
OKLab	oklab(43.05% 0.0706 -0.0722)
OKLCH	oklch(43.05% 0.101 314.3)
XYZ	xyz(10.1938, 7.3551, 18.0187)
Luminance	0.0736 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D76 #4F763D

analogous

#483D76 #643D76 #763D6B

triadic

#643D76 #76643D #3D7664

tetradic

#643D76 #76483D #4F763D #3D6B76

square

#643D76 #76483D #4F763D #3D6B76

split-complementary

#643D76 #6B763D #3D7648

monochromatic

#201325 #42284E #643D76 #86529E #A375B8

Accessibility & contrast

On white

8.50

#643D76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#643D76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D76

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D76	#FFFFFF	#000000	##FFFFFF
##643D76	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324A78

Deuteranopia (green-blind)

#3C4E74

Tritanopia (blue-blind)

#634554

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643d76;
/* rgb */ color: rgb(100, 61, 118);
/* oklch */ color: oklch(43.1% 0.101 314.3);

Tailwind

colors: {
  custom: {
    50: '#91749e',
    500: '#643d76',
    950: '#000000',
  },
}

SCSS

$custom: #643d76;
$custom-light: #91749e;
$custom-dark: #000000;

JSON

{
  "hex": "#643d76",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 118
  },
  "hsl": {
    "h": 281.053,
    "s": 31.844,
    "l": 35.098
  },
  "oklch": {
    "l": 0.43052,
    "c": 0.10093,
    "h": 314.3
  },
  "luminance": 0.07355
}

Semantic roles & 50–950 ramp

primary

#643D76

secondary

#7EA26D

accent

#C86081

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643D76

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

Preview Lab → · Contrast checker → · Palette generator →