#643F89#643F89

#643F89 is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.5% C 0.122 H 305.1°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#643F89
RGB	rgb(100, 63, 137)
HSL	hsl(270, 37%, 39%)
HSV	hsv(270, 54%, 54%)
CMYK	cmyk(27%, 54%, 0%, 46.3%)
CIE-LAB	lab(34.13, 31.56, -35.40)
CIE-LCH	lch(34.13, 47.43, 311.72°)
OKLab	oklab(44.53% 0.0699 -0.0995)
OKLCH	oklch(44.53% 0.122 305.1)
XYZ	xyz(11.5474, 8.0705, 24.6115)
Luminance	0.0807 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F89 #64893F

analogous

#3F3F89 #643F89 #893F89

triadic

#643F89 #89643F #3F8964

tetradic

#643F89 #893F3F #64893F #3F8989

square

#643F89 #893F3F #64893F #3F8989

split-complementary

#643F89 #89893F #3F893F

monochromatic

#271835 #452C5F #643F89 #8355B1 #A17EC4

Accessibility & contrast

On white

8.03

#643F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#643F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F89

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F89	#FFFFFF	#000000	##FFFFFF
##643F89	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274F8C

Deuteranopia (green-blind)

#335087

Tritanopia (blue-blind)

#5E4C5E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643f89;
/* rgb */ color: rgb(100, 63, 137);
/* oklch */ color: oklch(44.5% 0.122 305.1);

Tailwind

colors: {
  custom: {
    50: '#9275ac',
    500: '#643f89',
    950: '#000000',
  },
}

SCSS

$custom: #643f89;
$custom-light: #9275ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643f89",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 137
  },
  "hsl": {
    "h": 270,
    "s": 37,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44532,
    "c": 0.12159,
    "h": 305.1
  },
  "luminance": 0.0807
}

Semantic roles & 50–950 ramp

primary

#643F89

secondary

#92AE76

accent

#CD5B94

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643F89

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

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