#643A91#643A91

#643A91 is a dark, vivid violet. Relative luminance 0.078; OKLCH L 44.2% C 0.140 H 303.4°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#643A91
RGB	rgb(100, 58, 145)
HSL	hsl(269, 43%, 40%)
HSV	hsv(269, 60%, 57%)
CMYK	cmyk(31%, 60%, 0%, 43.1%)
CIE-LAB	lab(33.52, 36.53, -41.28)
CIE-LCH	lch(33.52, 55.13, 311.51°)
OKLab	oklab(44.25% 0.077 -0.1167)
OKLCH	oklch(44.25% 0.14 303.4)
XYZ	xyz(11.8783, 7.7798, 27.6584)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A91 #67913A

analogous

#3A3B91 #643A91 #903A91

triadic

#643A91 #91643A #3A9164

tetradic

#643A91 #913A3B #67913A #3A9190

square

#643A91 #913A3B #67913A #3A9190

split-complementary

#643A91 #91903A #3B913A

monochromatic

#28173A #462965 #643A91 #824FB9 #A17BCA

Accessibility & contrast

On white

8.22

#643A91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643A91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A91

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A91	#FFFFFF	#000000	##FFFFFF
##643A91	1.00	8.22	2.56	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124E94

Deuteranopia (green-blind)

#254F8F

Tritanopia (blue-blind)

#5C4B60

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643a91;
/* rgb */ color: rgb(100, 58, 145);
/* oklch */ color: oklch(44.2% 0.140 303.4);

Tailwind

colors: {
  custom: {
    50: '#9372b2',
    500: '#643a91',
    950: '#000000',
  },
}

SCSS

$custom: #643a91;
$custom-light: #9372b2;
$custom-dark: #000000;

JSON

{
  "hex": "#643a91",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 145
  },
  "hsl": {
    "h": 268.966,
    "s": 42.857,
    "l": 39.804
  },
  "oklch": {
    "l": 0.44245,
    "c": 0.13987,
    "h": 303.4
  },
  "luminance": 0.0778
}

Semantic roles & 50–950 ramp

primary

#643A91

secondary

#95B473

accent

#D35596

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643A91

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

Preview Lab → · Contrast checker → · Palette generator →