#643F76#643F76

#643F76 is a dark, moderate purple. Relative luminance 0.076; OKLCH L 43.4% C 0.097 H 313.9°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#643F76
RGB	rgb(100, 63, 118)
HSL	hsl(280, 30%, 35%)
HSV	hsv(280, 47%, 46%)
CMYK	cmyk(15.3%, 46.6%, 0%, 53.7%)
CIE-LAB	lab(33.08, 26.86, -25.26)
CIE-LCH	lch(33.08, 36.88, 316.76°)
OKLab	oklab(43.41% 0.0674 -0.07)
OKLCH	oklch(43.41% 0.097 313.9)
XYZ	xyz(10.3025, 7.5726, 18.0550)
Luminance	0.0757 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F76 #51763F

analogous

#483F76 #643F76 #763F6C

triadic

#643F76 #76643F #3F7664

tetradic

#643F76 #76483F #51763F #3F6C76

square

#643F76 #76483F #51763F #3F6C76

split-complementary

#643F76 #6C763F #3F7648

monochromatic

#201426 #422A4E #643F76 #86549E #A378B7

Accessibility & contrast

On white

8.35

#643F76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643F76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F76

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F76	#FFFFFF	#000000	##FFFFFF
##643F76	1.00	8.35	2.51	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#344C78

Deuteranopia (green-blind)

#3E4F74

Tritanopia (blue-blind)

#634755

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f76;
/* rgb */ color: rgb(100, 63, 118);
/* oklch */ color: oklch(43.4% 0.097 313.9);

Tailwind

colors: {
  custom: {
    50: '#91759e',
    500: '#643f76',
    950: '#000000',
  },
}

SCSS

$custom: #643f76;
$custom-light: #91759e;
$custom-dark: #000000;

JSON

{
  "hex": "#643f76",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 118
  },
  "hsl": {
    "h": 280.364,
    "s": 30.387,
    "l": 35.49
  },
  "oklch": {
    "l": 0.43406,
    "c": 0.0972,
    "h": 313.9
  },
  "luminance": 0.07572
}

Semantic roles & 50–950 ramp

primary

#643F76

secondary

#80A26F

accent

#C76182

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F76

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

Preview Lab → · Contrast checker → · Palette generator →