#643B79#643B79

#643B79 is a dark, moderate violet. Relative luminance 0.072; OKLCH L 42.9% C 0.108 H 313.2°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#643B79
RGB	rgb(100, 59, 121)
HSL	hsl(280, 34%, 35%)
HSV	hsv(280, 51%, 47%)
CMYK	cmyk(17.4%, 51.2%, 0%, 52.5%)
CIE-LAB	lab(32.30, 29.97, -28.37)
CIE-LCH	lch(32.30, 41.26, 316.57°)
OKLab	oklab(42.88% 0.0741 -0.079)
OKLCH	oklch(42.88% 0.108 313.2)
XYZ	xyz(10.2701, 7.2180, 18.9376)
Luminance	0.0722 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B79 #50793B

analogous

#453B79 #643B79 #793B6F

triadic

#643B79 #79643B #3B7964

tetradic

#643B79 #79453B #50793B #3B6F79

square

#643B79 #79453B #50793B #3B6F79

split-complementary

#643B79 #6F793B #3B7945

monochromatic

#201327 #422750 #643B79 #864FA2 #A373BB

Accessibility & contrast

On white

8.59

#643B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#643B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B79

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B79	#FFFFFF	#000000	##FFFFFF
##643B79	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4A7B

Deuteranopia (green-blind)

#394D77

Tritanopia (blue-blind)

#624554

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643b79;
/* rgb */ color: rgb(100, 59, 121);
/* oklch */ color: oklch(42.9% 0.108 313.2);

Tailwind

colors: {
  custom: {
    50: '#9272a0',
    500: '#643b79',
    950: '#000000',
  },
}

SCSS

$custom: #643b79;
$custom-light: #9272a0;
$custom-dark: #000000;

JSON

{
  "hex": "#643b79",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 279.677,
    "s": 34.444,
    "l": 35.294
  },
  "oklch": {
    "l": 0.42878,
    "c": 0.10832,
    "h": 313.2
  },
  "luminance": 0.07218
}

Semantic roles & 50–950 ramp

primary

#643B79

secondary

#7FA56B

accent

#CB5D82

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643B79

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

Preview Lab → · Contrast checker → · Palette generator →