#643F81#643F81

#643F81 is a dark, moderate violet. Relative luminance 0.078; OKLCH L 44.0% C 0.111 H 308.4°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#643F81
RGB	rgb(100, 63, 129)
HSL	hsl(274, 34%, 38%)
HSV	hsv(274, 51%, 51%)
CMYK	cmyk(22.5%, 51.2%, 0%, 49.4%)
CIE-LAB	lab(33.67, 29.54, -31.19)
CIE-LCH	lch(33.67, 42.96, 313.44°)
OKLab	oklab(44.04% 0.0691 -0.0872)
OKLCH	oklch(44.04% 0.111 308.4)
XYZ	xyz(10.9947, 7.8495, 21.7005)
Luminance	0.0785 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F81 #5C813F

analogous

#433F81 #643F81 #813F7D

triadic

#643F81 #81643F #3F8164

tetradic

#643F81 #81433F #5C813F #3F7D81

square

#643F81 #81433F #5C813F #3F7D81

split-complementary

#643F81 #7D813F #3F8143

monochromatic

#24172F #442B58 #643F81 #8453AA #A17CBF

Accessibility & contrast

On white

8.17

#643F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#643F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F81

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F81	#FFFFFF	#000000	##FFFFFF
##643F81	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)

#2D4E83

Deuteranopia (green-blind)

#38507F

Tritanopia (blue-blind)

#604A5A

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643f81;
/* rgb */ color: rgb(100, 63, 129);
/* oklch */ color: oklch(44.0% 0.111 308.4);

Tailwind

colors: {
  custom: {
    50: '#9275a6',
    500: '#643f81',
    950: '#000000',
  },
}

SCSS

$custom: #643f81;
$custom-light: #9275a6;
$custom-dark: #000000;

JSON

{
  "hex": "#643f81",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 129
  },
  "hsl": {
    "h": 273.636,
    "s": 34.375,
    "l": 37.647
  },
  "oklch": {
    "l": 0.44039,
    "c": 0.11126,
    "h": 308.4
  },
  "luminance": 0.07849
}

Semantic roles & 50–950 ramp

primary

#643F81

secondary

#8BA973

accent

#CA5D8D

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643F81

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

Preview Lab → · Contrast checker → · Palette generator →