#643B81#643B81

#643B81 is a dark, moderate violet. Relative luminance 0.074; OKLCH L 43.4% C 0.118 H 309.4°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#643B81
RGB	rgb(100, 59, 129)
HSL	hsl(275, 37%, 37%)
HSV	hsv(275, 54%, 51%)
CMYK	cmyk(22.5%, 54.3%, 0%, 49.4%)
CIE-LAB	lab(32.75, 31.91, -32.65)
CIE-LCH	lch(32.75, 45.65, 314.35°)
OKLab	oklab(43.36% 0.075 -0.0914)
OKLCH	oklch(43.36% 0.118 309.4)
XYZ	xyz(10.7812, 7.4224, 21.6293)
Luminance	0.0742 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B81 #58813B

analogous

#413B81 #643B81 #813B7B

triadic

#643B81 #81643B #3B8164

tetradic

#643B81 #81413B #58813B #3B7B81

square

#643B81 #81413B #58813B #3B7B81

split-complementary

#643B81 #7B813B #3B8141

monochromatic

#23152D #432857 #643B81 #854EAB #A276C0

Accessibility & contrast

On white

8.45

#643B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#643B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B81

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B81	#FFFFFF	#000000	##FFFFFF
##643B81	1.00	8.45	2.48	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274B83

Deuteranopia (green-blind)

#344E7F

Tritanopia (blue-blind)

#604758

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643b81;
/* rgb */ color: rgb(100, 59, 129);
/* oklch */ color: oklch(43.4% 0.118 309.4);

Tailwind

colors: {
  custom: {
    50: '#9272a6',
    500: '#643b81',
    950: '#000000',
  },
}

SCSS

$custom: #643b81;
$custom-light: #9272a6;
$custom-dark: #000000;

JSON

{
  "hex": "#643b81",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 129
  },
  "hsl": {
    "h": 275.143,
    "s": 37.234,
    "l": 36.863
  },
  "oklch": {
    "l": 0.43359,
    "c": 0.11827,
    "h": 309.4
  },
  "luminance": 0.07422
}

Semantic roles & 50–950 ramp

primary

#643B81

secondary

#87AA6E

accent

#CD5B8A

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643B81

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

Preview Lab → · Contrast checker → · Palette generator →