#643B7D#643B7D

#643B7D is a dark, moderate violet. Relative luminance 0.073; OKLCH L 43.1% C 0.113 H 311.2°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#643B7D
RGB	rgb(100, 59, 125)
HSL	hsl(277, 36%, 36%)
HSV	hsv(277, 53%, 49%)
CMYK	cmyk(20%, 52.8%, 0%, 51%)
CIE-LAB	lab(32.52, 30.93, -30.52)
CIE-LCH	lch(32.52, 43.45, 315.38°)
OKLab	oklab(43.11% 0.0746 -0.0853)
OKLCH	oklch(43.11% 0.113 311.2)
XYZ	xyz(10.5205, 7.3181, 20.2564)
Luminance	0.0732 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B7D #547D3B

analogous

#433B7D #643B7D #7D3B75

triadic

#643B7D #7D643B #3B7D64

tetradic

#643B7D #7D433B #547D3B #3B757D

square

#643B7D #7D433B #547D3B #3B757D

split-complementary

#643B7D #757D3B #3B7D43

monochromatic

#21142A #432753 #643B7D #854FA7 #A275BE

Accessibility & contrast

On white

8.52

#643B7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#643B7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B7D

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B7D	#FFFFFF	#000000	##FFFFFF
##643B7D	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4A7F

Deuteranopia (green-blind)

#374D7B

Tritanopia (blue-blind)

#614656

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643b7d;
/* rgb */ color: rgb(100, 59, 125);
/* oklch */ color: oklch(43.1% 0.113 311.2);

Tailwind

colors: {
  custom: {
    50: '#9272a3',
    500: '#643b7d',
    950: '#000000',
  },
}

SCSS

$custom: #643b7d;
$custom-light: #9272a3;
$custom-dark: #000000;

JSON

{
  "hex": "#643b7d",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 125
  },
  "hsl": {
    "h": 277.273,
    "s": 35.87,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43115,
    "c": 0.11328,
    "h": 311.2
  },
  "luminance": 0.07318
}

Semantic roles & 50–950 ramp

primary

#643B7D

secondary

#83A76C

accent

#CC5C86

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643B7D

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

Preview Lab → · Contrast checker → · Palette generator →