#643D89#643D89

#643D89 is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.2% C 0.125 H 305.6°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#643D89
RGB	rgb(100, 61, 137)
HSL	hsl(271, 38%, 39%)
HSV	hsv(271, 55%, 54%)
CMYK	cmyk(27%, 55.5%, 0%, 46.3%)
CIE-LAB	lab(33.67, 32.74, -36.12)
CIE-LCH	lch(33.67, 48.76, 312.19°)
OKLab	oklab(44.2% 0.0727 -0.1016)
OKLCH	oklch(44.2% 0.125 305.6)
XYZ	xyz(11.4387, 7.8530, 24.5752)
Luminance	0.0785 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D89 #62893D

analogous

#3E3D89 #643D89 #893D88

triadic

#643D89 #89643D #3D8964

tetradic

#643D89 #893E3D #62893D #3D8889

square

#643D89 #893E3D #62893D #3D8889

split-complementary

#643D89 #88893D #3D893E

monochromatic

#261734 #452A5F #643D89 #8351B2 #A17CC5

Accessibility & contrast

On white

8.17

#643D89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#643D89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D89

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D89	#FFFFFF	#000000	##FFFFFF
##643D89	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244E8C

Deuteranopia (green-blind)

#304F87

Tritanopia (blue-blind)

#5E4B5D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643d89;
/* rgb */ color: rgb(100, 61, 137);
/* oklch */ color: oklch(44.2% 0.125 305.6);

Tailwind

colors: {
  custom: {
    50: '#9274ac',
    500: '#643d89',
    950: '#000000',
  },
}

SCSS

$custom: #643d89;
$custom-light: #9274ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643d89",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 137
  },
  "hsl": {
    "h": 270.789,
    "s": 38.384,
    "l": 38.824
  },
  "oklch": {
    "l": 0.44196,
    "c": 0.12496,
    "h": 305.6
  },
  "luminance": 0.07853
}

Semantic roles & 50–950 ramp

primary

#643D89

secondary

#90AE73

accent

#CE5992

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643D89

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

Preview Lab → · Contrast checker → · Palette generator →