#643B8F#643B8F

#643B8F is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.3% C 0.136 H 303.9°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#643B8F
RGB	rgb(100, 59, 143)
HSL	hsl(269, 42%, 40%)
HSV	hsv(269, 59%, 56%)
CMYK	cmyk(30.1%, 58.7%, 0%, 43.9%)
CIE-LAB	lab(33.61, 35.44, -39.92)
CIE-LCH	lch(33.61, 53.39, 311.60°)
OKLab	oklab(44.27% 0.0757 -0.1127)
OKLCH	oklch(44.27% 0.136 303.9)
XYZ	xyz(11.7763, 7.8205, 26.8704)
Luminance	0.0782 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B8F #668F3B

analogous

#3B3C8F #643B8F #8E3B8F

triadic

#643B8F #8F643B #3B8F64

tetradic

#643B8F #8F3B3C #668F3B #3B8F8E

square

#643B8F #8F3B3C #668F3B #3B8F8E

split-complementary

#643B8F #8F8E3B #3C8F3B

monochromatic

#271738 #462964 #643B8F #8250B7 #A17CC9

Accessibility & contrast

On white

8.19

#643B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B8F

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B8F	#FFFFFF	#000000	##FFFFFF
##643B8F	1.00	8.19	2.56	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184E92

Deuteranopia (green-blind)

#294F8D

Tritanopia (blue-blind)

#5C4B5F

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643b8f;
/* rgb */ color: rgb(100, 59, 143);
/* oklch */ color: oklch(44.3% 0.136 303.9);

Tailwind

colors: {
  custom: {
    50: '#9373b0',
    500: '#643b8f',
    950: '#000000',
  },
}

SCSS

$custom: #643b8f;
$custom-light: #9373b0;
$custom-dark: #000000;

JSON

{
  "hex": "#643b8f",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 143
  },
  "hsl": {
    "h": 269.286,
    "s": 41.584,
    "l": 39.608
  },
  "oklch": {
    "l": 0.44266,
    "c": 0.1358,
    "h": 303.9
  },
  "luminance": 0.0782
}

Semantic roles & 50–950 ramp

primary

#643B8F

secondary

#94B273

accent

#D15695

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643B8F

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

Preview Lab → · Contrast checker → · Palette generator →