#643B7B#643B7B

#643B7B is a dark, moderate violet. Relative luminance 0.073; OKLCH L 43.0% C 0.111 H 312.2°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#643B7B
RGB	rgb(100, 59, 123)
HSL	hsl(278, 35%, 36%)
HSV	hsv(278, 52%, 48%)
CMYK	cmyk(18.7%, 52%, 0%, 51.8%)
CIE-LAB	lab(32.41, 30.45, -29.45)
CIE-LCH	lch(32.41, 42.36, 315.96°)
OKLab	oklab(43% 0.0744 -0.0821)
OKLCH	oklch(43% 0.111 312.2)
XYZ	xyz(10.3940, 7.2675, 19.5903)
Luminance	0.0727 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B7B #527B3B

analogous

#443B7B #643B7B #7B3B72

triadic

#643B7B #7B643B #3B7B64

tetradic

#643B7B #7B443B #527B3B #3B727B

square

#643B7B #7B443B #527B3B #3B727B

split-complementary

#643B7B #727B3B #3B7B44

monochromatic

#211328 #422752 #643B7B #864FA4 #A274BC

Accessibility & contrast

On white

8.56

#643B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#643B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B7B

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B7B	#FFFFFF	#000000	##FFFFFF
##643B7B	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4A7D

Deuteranopia (green-blind)

#384D79

Tritanopia (blue-blind)

#624555

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643b7b;
/* rgb */ color: rgb(100, 59, 123);
/* oklch */ color: oklch(43.0% 0.111 312.2);

Tailwind

colors: {
  custom: {
    50: '#9272a1',
    500: '#643b7b',
    950: '#000000',
  },
}

SCSS

$custom: #643b7b;
$custom-light: #9272a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643b7b",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 123
  },
  "hsl": {
    "h": 278.438,
    "s": 35.165,
    "l": 35.686
  },
  "oklch": {
    "l": 0.42996,
    "c": 0.1108,
    "h": 312.2
  },
  "luminance": 0.07267
}

Semantic roles & 50–950 ramp

primary

#643B7B

secondary

#81A66C

accent

#CB5D84

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643B7B

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

Preview Lab → · Contrast checker → · Palette generator →