#643A8F#643A8F

#643A8F is a dark, vivid violet. Relative luminance 0.077; OKLCH L 44.1% C 0.137 H 304.1°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#643A8F
RGB	rgb(100, 58, 143)
HSL	hsl(270, 42%, 39%)
HSV	hsv(270, 59%, 56%)
CMYK	cmyk(30.1%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(33.39, 36.02, -40.27)
CIE-LCH	lch(33.39, 54.03, 311.81°)
OKLab	oklab(44.11% 0.077 -0.1137)
OKLCH	oklch(44.11% 0.137 304.1)
XYZ	xyz(11.7254, 7.7186, 26.8534)
Luminance	0.0772 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A8F #658F3A

analogous

#3A3A8F #643A8F #8F3A8F

triadic

#643A8F #8F643A #3A8F64

tetradic

#643A8F #8F3A3A #658F3A #3A8F8F

square

#643A8F #8F3A3A #658F3A #3A8F8F

split-complementary

#643A8F #8F8F3A #3A8F3A

monochromatic

#271738 #462863 #643A8F #824FB7 #A17AC9

Accessibility & contrast

On white

8.26

#643A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#643A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A8F

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A8F	#FFFFFF	#000000	##FFFFFF
##643A8F	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154D92

Deuteranopia (green-blind)

#274E8D

Tritanopia (blue-blind)

#5C4B5F

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643a8f;
/* rgb */ color: rgb(100, 58, 143);
/* oklch */ color: oklch(44.1% 0.137 304.1);

Tailwind

colors: {
  custom: {
    50: '#9372b0',
    500: '#643a8f',
    950: '#000000',
  },
}

SCSS

$custom: #643a8f;
$custom-light: #9372b0;
$custom-dark: #000000;

JSON

{
  "hex": "#643a8f",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 269.647,
    "s": 42.289,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44108,
    "c": 0.13739,
    "h": 304.1
  },
  "luminance": 0.07719
}

Semantic roles & 50–950 ramp

primary

#643A8F

secondary

#93B372

accent

#D25695

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A8F

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

Preview Lab → · Contrast checker → · Palette generator →