#643A8D#643A8D

#643A8D is a dark, vivid violet. Relative luminance 0.077; OKLCH L 44.0% C 0.135 H 304.8°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#643A8D
RGB	rgb(100, 58, 141)
HSL	hsl(270, 42%, 39%)
HSV	hsv(270, 59%, 55%)
CMYK	cmyk(29.1%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(33.26, 35.50, -39.25)
CIE-LCH	lch(33.26, 52.92, 312.13°)
OKLab	oklab(43.97% 0.077 -0.1107)
OKLCH	oklch(43.97% 0.135 304.8)
XYZ	xyz(11.5753, 7.6586, 26.0626)
Luminance	0.0766 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A8D #638D3A

analogous

#3A3A8D #643A8D #8D3A8D

triadic

#643A8D #8D643A #3A8D64

tetradic

#643A8D #8D3A3A #638D3A #3A8D8D

square

#643A8D #8D3A3A #638D3A #3A8D8D

split-complementary

#643A8D #8D8D3A #3A8D3A

monochromatic

#261636 #452862 #643A8D #834EB6 #A179C8

Accessibility & contrast

On white

8.29

#643A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#643A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A8D

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A8D	#FFFFFF	#000000	##FFFFFF
##643A8D	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184D90

Deuteranopia (green-blind)

#294E8B

Tritanopia (blue-blind)

#5D4A5E

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643a8d;
/* rgb */ color: rgb(100, 58, 141);
/* oklch */ color: oklch(44.0% 0.135 304.8);

Tailwind

colors: {
  custom: {
    50: '#9372af',
    500: '#643a8d',
    950: '#000000',
  },
}

SCSS

$custom: #643a8d;
$custom-light: #9372af;
$custom-dark: #000000;

JSON

{
  "hex": "#643a8d",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 270.361,
    "s": 41.709,
    "l": 39.02
  },
  "oklch": {
    "l": 0.43973,
    "c": 0.1349,
    "h": 304.8
  },
  "luminance": 0.07659
}

Semantic roles & 50–950 ramp

primary

#643A8D

secondary

#91B171

accent

#D25693

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A8D

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

Preview Lab → · Contrast checker → · Palette generator →