#643B7C#643B7C

#643B7C is a dark, moderate violet. Relative luminance 0.073; OKLCH L 43.1% C 0.112 H 311.7°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#643B7C
RGB	rgb(100, 59, 124)
HSL	hsl(278, 36%, 36%)
HSV	hsv(278, 52%, 49%)
CMYK	cmyk(19.4%, 52.4%, 0%, 51.4%)
CIE-LAB	lab(32.46, 30.69, -29.98)
CIE-LCH	lch(32.46, 42.90, 315.67°)
OKLab	oklab(43.06% 0.0745 -0.0837)
OKLCH	oklch(43.06% 0.112 311.7)
XYZ	xyz(10.4569, 7.2927, 19.9216)
Luminance	0.0729 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B7C #537C3B

analogous

#433B7C #643B7C #7C3B73

triadic

#643B7C #7C643B #3B7C64

tetradic

#643B7C #7C433B #537C3B #3B737C

square

#643B7C #7C433B #537C3B #3B737C

split-complementary

#643B7C #737C3B #3B7C43

monochromatic

#211429 #432753 #643B7C #854FA5 #A274BD

Accessibility & contrast

On white

8.54

#643B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#643B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B7C

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B7C	#FFFFFF	#000000	##FFFFFF
##643B7C	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B4A7E

Deuteranopia (green-blind)

#374D7A

Tritanopia (blue-blind)

#614656

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643b7c;
/* rgb */ color: rgb(100, 59, 124);
/* oklch */ color: oklch(43.1% 0.112 311.7);

Tailwind

colors: {
  custom: {
    50: '#9272a2',
    500: '#643b7c',
    950: '#000000',
  },
}

SCSS

$custom: #643b7c;
$custom-light: #9272a2;
$custom-dark: #000000;

JSON

{
  "hex": "#643b7c",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 124
  },
  "hsl": {
    "h": 277.846,
    "s": 35.519,
    "l": 35.882
  },
  "oklch": {
    "l": 0.43055,
    "c": 0.11204,
    "h": 311.7
  },
  "luminance": 0.07292
}

Semantic roles & 50–950 ramp

primary

#643B7C

secondary

#82A76C

accent

#CC5C85

background

#F9F7FA

surface

#F1EDF3

border

#CBC8CD

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643B7C

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

Preview Lab → · Contrast checker → · Palette generator →