#643B91#643B91

#643B91 is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.4% C 0.138 H 303.2°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#643B91
RGB	rgb(100, 59, 145)
HSL	hsl(269, 42%, 40%)
HSV	hsv(269, 59%, 57%)
CMYK	cmyk(31%, 59.3%, 0%, 43.1%)
CIE-LAB	lab(33.74, 35.96, -40.94)
CIE-LCH	lch(33.74, 54.49, 311.30°)
OKLab	oklab(44.4% 0.0757 -0.1157)
OKLCH	oklch(44.4% 0.138 303.2)
XYZ	xyz(11.9292, 7.8816, 27.6754)
Luminance	0.0788 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B91 #68913B

analogous

#3B3D91 #643B91 #8F3B91

triadic

#643B91 #91643B #3B9164

tetradic

#643B91 #913B3D #68913B #3B918F

square

#643B91 #913B3D #68913B #3B918F

split-complementary

#643B91 #918F3B #3D913B

monochromatic

#28183A #462966 #643B91 #8251B8 #A17CCA

Accessibility & contrast

On white

8.15

#643B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#643B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B91

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B91	#FFFFFF	#000000	##FFFFFF
##643B91	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154E94

Deuteranopia (green-blind)

#274F8F

Tritanopia (blue-blind)

#5C4C60

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643b91;
/* rgb */ color: rgb(100, 59, 145);
/* oklch */ color: oklch(44.4% 0.138 303.2);

Tailwind

colors: {
  custom: {
    50: '#9373b2',
    500: '#643b91',
    950: '#000000',
  },
}

SCSS

$custom: #643b91;
$custom-light: #9373b2;
$custom-dark: #000000;

JSON

{
  "hex": "#643b91",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 145
  },
  "hsl": {
    "h": 268.605,
    "s": 42.157,
    "l": 40
  },
  "oklch": {
    "l": 0.44402,
    "c": 0.1383,
    "h": 303.2
  },
  "luminance": 0.07882
}

Semantic roles & 50–950 ramp

primary

#643B91

secondary

#95B474

accent

#D25697

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643B91

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

Preview Lab → · Contrast checker → · Palette generator →