#643D8F#643D8F

#643D8F is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.6% C 0.133 H 303.4°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#643D8F
RGB	rgb(100, 61, 143)
HSL	hsl(269, 40%, 40%)
HSV	hsv(269, 57%, 56%)
CMYK	cmyk(30.1%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(34.05, 34.29, -39.22)
CIE-LCH	lch(34.05, 52.09, 311.16°)
OKLab	oklab(44.59% 0.073 -0.1107)
OKLCH	oklch(44.59% 0.133 303.4)
XYZ	xyz(11.8811, 8.0300, 26.9053)
Luminance	0.0803 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D8F #688F3D

analogous

#3D3F8F #643D8F #8D3D8F

triadic

#643D8F #8F643D #3D8F64

tetradic

#643D8F #8F3D3F #688F3D #3D8F8D

square

#643D8F #8F3D3F #688F3D #3D8F8D

split-complementary

#643D8F #8F8D3D #3F8F3D

monochromatic

#281839 #462B64 #643D8F #8253B6 #A17EC8

Accessibility & contrast

On white

8.06

#643D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#643D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D8F

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D8F	#FFFFFF	#000000	##FFFFFF
##643D8F	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4F92

Deuteranopia (green-blind)

#2B508D

Tritanopia (blue-blind)

#5C4D60

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643d8f;
/* rgb */ color: rgb(100, 61, 143);
/* oklch */ color: oklch(44.6% 0.133 303.4);

Tailwind

colors: {
  custom: {
    50: '#9374b0',
    500: '#643d8f',
    950: '#000000',
  },
}

SCSS

$custom: #643d8f;
$custom-light: #9374b0;
$custom-dark: #000000;

JSON

{
  "hex": "#643d8f",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 268.537,
    "s": 40.196,
    "l": 40
  },
  "oklch": {
    "l": 0.44589,
    "c": 0.13258,
    "h": 303.4
  },
  "luminance": 0.0803
}

Semantic roles & 50–950 ramp

primary

#643D8F

secondary

#95B276

accent

#D05897

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643D8F

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

Preview Lab → · Contrast checker → · Palette generator →