#643C81#643C81

#643C81 is a dark, moderate violet. Relative luminance 0.075; OKLCH L 43.5% C 0.117 H 309.1°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#643C81
RGB	rgb(100, 60, 129)
HSL	hsl(275, 37%, 37%)
HSV	hsv(275, 53%, 51%)
CMYK	cmyk(22.5%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(32.98, 31.32, -32.29)
CIE-LCH	lch(32.98, 44.98, 314.13°)
OKLab	oklab(43.53% 0.0735 -0.0904)
OKLCH	oklch(43.53% 0.117 309.1)
XYZ	xyz(10.8331, 7.5262, 21.6466)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C81 #59813C

analogous

#423C81 #643C81 #813C7C

triadic

#643C81 #81643C #3C8164

tetradic

#643C81 #81423C #59813C #3C7C81

square

#643C81 #81423C #59813C #3C7C81

split-complementary

#643C81 #7C813C #3C8142

monochromatic

#23152D #442957 #643C81 #844FAB #A177C0

Accessibility & contrast

On white

8.38

#643C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C81

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C81	#FFFFFF	#000000	##FFFFFF
##643C81	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)

#294C83

Deuteranopia (green-blind)

#354E7F

Tritanopia (blue-blind)

#604858

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643c81;
/* rgb */ color: rgb(100, 60, 129);
/* oklch */ color: oklch(43.5% 0.117 309.1);

Tailwind

colors: {
  custom: {
    50: '#9273a6',
    500: '#643c81',
    950: '#000000',
  },
}

SCSS

$custom: #643c81;
$custom-light: #9273a6;
$custom-dark: #000000;

JSON

{
  "hex": "#643c81",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 274.783,
    "s": 36.508,
    "l": 37.059
  },
  "oklch": {
    "l": 0.43527,
    "c": 0.11654,
    "h": 309.1
  },
  "luminance": 0.07526
}

Semantic roles & 50–950 ramp

primary

#643C81

secondary

#88AA6F

accent

#CD5B8B

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643C81

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

Preview Lab → · Contrast checker → · Palette generator →