#643A7D#643A7D

#643A7D is a dark, moderate violet. Relative luminance 0.072; OKLCH L 42.9% C 0.115 H 311.4°. Best body text is #FFFFFF at 8.60:1 contrast (WCAG AA passes).

Color values

HEX	#643A7D
RGB	rgb(100, 58, 125)
HSL	hsl(278, 37%, 36%)
HSV	hsv(278, 54%, 49%)
CMYK	cmyk(20%, 53.6%, 0%, 51%)
CIE-LAB	lab(32.29, 31.52, -30.88)
CIE-LCH	lch(32.29, 44.12, 315.59°)
OKLab	oklab(42.95% 0.0761 -0.0863)
OKLCH	oklch(42.95% 0.115 311.4)
XYZ	xyz(10.4696, 7.2163, 20.2394)
Luminance	0.0722 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A7D #537D3A

analogous

#423A7D #643A7D #7D3A74

triadic

#643A7D #7D643A #3A7D64

tetradic

#643A7D #7D423A #537D3A #3A747D

square

#643A7D #7D423A #537D3A #3A747D

split-complementary

#643A7D #747D3A #3A7D42

monochromatic

#211329 #432753 #643A7D #854DA7 #A273BE

Accessibility & contrast

On white

8.60

#643A7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#643A7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A7D

8.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A7D	#FFFFFF	#000000	##FFFFFF
##643A7D	1.00	8.60	2.44	8.60
#FFFFFF	8.60	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294A7F

Deuteranopia (green-blind)

#364D7B

Tritanopia (blue-blind)

#614556

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643a7d;
/* rgb */ color: rgb(100, 58, 125);
/* oklch */ color: oklch(42.9% 0.115 311.4);

Tailwind

colors: {
  custom: {
    50: '#9272a3',
    500: '#643a7d',
    950: '#000000',
  },
}

SCSS

$custom: #643a7d;
$custom-light: #9272a3;
$custom-dark: #000000;

JSON

{
  "hex": "#643a7d",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 125
  },
  "hsl": {
    "h": 277.612,
    "s": 36.612,
    "l": 35.882
  },
  "oklch": {
    "l": 0.42948,
    "c": 0.11505,
    "h": 311.4
  },
  "luminance": 0.07216
}

Semantic roles & 50–950 ramp

primary

#643A7D

secondary

#82A86B

accent

#CD5B86

background

#F9F6FA

surface

#F1ECF4

border

#CBC7CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643A7D

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

Preview Lab → · Contrast checker → · Palette generator →