#643E83#643E83

#643E83 is a dark, moderate violet. Relative luminance 0.078; OKLCH L 44.0% C 0.116 H 307.8°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#643E83
RGB	rgb(100, 62, 131)
HSL	hsl(273, 36%, 38%)
HSV	hsv(273, 53%, 51%)
CMYK	cmyk(23.7%, 52.7%, 0%, 48.6%)
CIE-LAB	lab(33.55, 30.64, -32.62)
CIE-LCH	lch(33.55, 44.75, 313.20°)
OKLab	oklab(43.99% 0.0708 -0.0914)
OKLCH	oklch(43.99% 0.116 307.8)
XYZ	xyz(11.0741, 7.7934, 22.3892)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E83 #5D833E

analogous

#413E83 #643E83 #833E7F

triadic

#643E83 #83643E #3E8364

tetradic

#643E83 #83413E #5D833E #3E7F83

square

#643E83 #83413E #5D833E #3E7F83

split-complementary

#643E83 #7F833E #3E8341

monochromatic

#251730 #442A59 #643E83 #8452AD #A17BC0

Accessibility & contrast

On white

8.21

#643E83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643E83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E83

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E83	#FFFFFF	#000000	##FFFFFF
##643E83	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4D85

Deuteranopia (green-blind)

#364F81

Tritanopia (blue-blind)

#604A5A

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643e83;
/* rgb */ color: rgb(100, 62, 131);
/* oklch */ color: oklch(44.0% 0.116 307.8);

Tailwind

colors: {
  custom: {
    50: '#9274a7',
    500: '#643e83',
    950: '#000000',
  },
}

SCSS

$custom: #643e83;
$custom-light: #9274a7;
$custom-dark: #000000;

JSON

{
  "hex": "#643e83",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 131
  },
  "hsl": {
    "h": 273.043,
    "s": 35.751,
    "l": 37.843
  },
  "oklch": {
    "l": 0.43988,
    "c": 0.11559,
    "h": 307.8
  },
  "luminance": 0.07793
}

Semantic roles & 50–950 ramp

primary

#643E83

secondary

#8CAB72

accent

#CC5C8E

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643E83

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

Preview Lab → · Contrast checker → · Palette generator →