#643B85#643B85

#643B85 is a dark, vivid violet. Relative luminance 0.075; OKLCH L 43.6% C 0.123 H 307.7°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#643B85
RGB	rgb(100, 59, 133)
HSL	hsl(273, 39%, 38%)
HSV	hsv(273, 56%, 52%)
CMYK	cmyk(24.8%, 55.6%, 0%, 47.8%)
CIE-LAB	lab(32.99, 32.90, -34.75)
CIE-LCH	lch(32.99, 47.86, 313.43°)
OKLab	oklab(43.61% 0.0753 -0.0976)
OKLCH	oklch(43.61% 0.123 307.7)
XYZ	xyz(11.0523, 7.5308, 23.0571)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B85 #5C853B

analogous

#3F3B85 #643B85 #853B81

triadic

#643B85 #85643B #3B8564

tetradic

#643B85 #853F3B #5C853B #3B8185

square

#643B85 #853F3B #5C853B #3B8185

split-complementary

#643B85 #81853B #3B853F

monochromatic

#241530 #44285B #643B85 #844EAF #A178C3

Accessibility & contrast

On white

8.38

#643B85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643B85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B85

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B85	#FFFFFF	#000000	##FFFFFF
##643B85	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244C87

Deuteranopia (green-blind)

#314E83

Tritanopia (blue-blind)

#5F485A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643b85;
/* rgb */ color: rgb(100, 59, 133);
/* oklch */ color: oklch(43.6% 0.123 307.7);

Tailwind

colors: {
  custom: {
    50: '#9272a9',
    500: '#643b85',
    950: '#000000',
  },
}

SCSS

$custom: #643b85;
$custom-light: #9272a9;
$custom-dark: #000000;

JSON

{
  "hex": "#643b85",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 133
  },
  "hsl": {
    "h": 273.243,
    "s": 38.542,
    "l": 37.647
  },
  "oklch": {
    "l": 0.4361,
    "c": 0.12328,
    "h": 307.7
  },
  "luminance": 0.07531
}

Semantic roles & 50–950 ramp

primary

#643B85

secondary

#8BAC6F

accent

#CE598E

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643B85

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

Preview Lab → · Contrast checker → · Palette generator →