#643E81#643E81

#643E81 is a dark, moderate violet. Relative luminance 0.077; OKLCH L 43.9% C 0.113 H 308.6°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#643E81
RGB	rgb(100, 62, 129)
HSL	hsl(274, 35%, 37%)
HSV	hsv(274, 52%, 51%)
CMYK	cmyk(22.5%, 51.9%, 0%, 49.4%)
CIE-LAB	lab(33.43, 30.14, -31.56)
CIE-LCH	lch(33.43, 43.64, 313.68°)
OKLab	oklab(43.87% 0.0706 -0.0883)
OKLCH	oklch(43.87% 0.113 308.6)
XYZ	xyz(10.9398, 7.7397, 21.6822)
Luminance	0.0774 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E81 #5B813E

analogous

#423E81 #643E81 #813E7D

triadic

#643E81 #81643E #3E8164

tetradic

#643E81 #81423E #5B813E #3E7D81

square

#643E81 #81423E #5B813E #3E7D81

split-complementary

#643E81 #7D813E #3E8142

monochromatic

#24162E #442A58 #643E81 #8452AA #A17ABF

Accessibility & contrast

On white

8.24

#643E81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#643E81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E81

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E81	#FFFFFF	#000000	##FFFFFF
##643E81	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4D83

Deuteranopia (green-blind)

#374F7F

Tritanopia (blue-blind)

#604959

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643e81;
/* rgb */ color: rgb(100, 62, 129);
/* oklch */ color: oklch(43.9% 0.113 308.6);

Tailwind

colors: {
  custom: {
    50: '#9274a6',
    500: '#643e81',
    950: '#000000',
  },
}

SCSS

$custom: #643e81;
$custom-light: #9274a6;
$custom-dark: #000000;

JSON

{
  "hex": "#643e81",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 129
  },
  "hsl": {
    "h": 274.03,
    "s": 35.079,
    "l": 37.451
  },
  "oklch": {
    "l": 0.43867,
    "c": 0.11303,
    "h": 308.6
  },
  "luminance": 0.0774
}

Semantic roles & 50–950 ramp

primary

#643E81

secondary

#8AA972

accent

#CB5D8C

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643E81

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

Preview Lab → · Contrast checker → · Palette generator →