#643E76#643E76

#643E76 is a dark, moderate purple. Relative luminance 0.075; OKLCH L 43.2% C 0.099 H 314.1°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#643E76
RGB	rgb(100, 62, 118)
HSL	hsl(281, 31%, 35%)
HSV	hsv(281, 47%, 46%)
CMYK	cmyk(15.3%, 47.5%, 0%, 53.7%)
CIE-LAB	lab(32.84, 27.47, -25.64)
CIE-LCH	lch(32.84, 37.57, 316.97°)
OKLab	oklab(43.23% 0.069 -0.0711)
OKLCH	oklch(43.23% 0.099 314.1)
XYZ	xyz(10.2476, 7.4628, 18.0367)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E76 #50763E

analogous

#483E76 #643E76 #763E6C

triadic

#643E76 #76643E #3E7664

tetradic

#643E76 #76483E #50763E #3E6C76

square

#643E76 #76483E #50763E #3E6C76

split-complementary

#643E76 #6C763E #3E7648

monochromatic

#201426 #42294E #643E76 #86539E #A377B7

Accessibility & contrast

On white

8.42

#643E76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#643E76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E76

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E76	#FFFFFF	#000000	##FFFFFF
##643E76	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334B78

Deuteranopia (green-blind)

#3D4E74

Tritanopia (blue-blind)

#634654

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643e76;
/* rgb */ color: rgb(100, 62, 118);
/* oklch */ color: oklch(43.2% 0.099 314.1);

Tailwind

colors: {
  custom: {
    50: '#91749e',
    500: '#643e76',
    950: '#000000',
  },
}

SCSS

$custom: #643e76;
$custom-light: #91749e;
$custom-dark: #000000;

JSON

{
  "hex": "#643e76",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 118
  },
  "hsl": {
    "h": 280.714,
    "s": 31.111,
    "l": 35.294
  },
  "oklch": {
    "l": 0.43228,
    "c": 0.09908,
    "h": 314.1
  },
  "luminance": 0.07463
}

Semantic roles & 50–950 ramp

primary

#643E76

secondary

#7FA26E

accent

#C76082

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643E76

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

Preview Lab → · Contrast checker → · Palette generator →