#643C88#643C88

#643C88 is a dark, vivid violet. Relative luminance 0.077; OKLCH L 44.0% C 0.125 H 306.2°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#643C88
RGB	rgb(100, 60, 136)
HSL	hsl(272, 39%, 38%)
HSV	hsv(272, 56%, 53%)
CMYK	cmyk(26.5%, 55.9%, 0%, 46.7%)
CIE-LAB	lab(33.39, 33.07, -35.96)
CIE-LCH	lch(33.39, 48.86, 312.60°)
OKLab	oklab(43.97% 0.0741 -0.1011)
OKLCH	oklch(43.97% 0.125 306.2)
XYZ	xyz(11.3144, 7.7187, 24.1816)
Luminance	0.0772 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C88 #60883C

analogous

#3E3C88 #643C88 #883C86

triadic

#643C88 #88643C #3C8864

tetradic

#643C88 #883E3C #60883C #3C8688

square

#643C88 #883E3C #60883C #3C8688

split-complementary

#643C88 #86883C #3C883E

monochromatic

#261733 #45295E #643C88 #8350B2 #A17AC4

Accessibility & contrast

On white

8.26

#643C88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#643C88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C88

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C88	#FFFFFF	#000000	##FFFFFF
##643C88	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234D8B

Deuteranopia (green-blind)

#304F86

Tritanopia (blue-blind)

#5E4A5C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643c88;
/* rgb */ color: rgb(100, 60, 136);
/* oklch */ color: oklch(44.0% 0.125 306.2);

Tailwind

colors: {
  custom: {
    50: '#9273ab',
    500: '#643c88',
    950: '#000000',
  },
}

SCSS

$custom: #643c88;
$custom-light: #9273ab;
$custom-dark: #000000;

JSON

{
  "hex": "#643c88",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 136
  },
  "hsl": {
    "h": 271.579,
    "s": 38.776,
    "l": 38.431
  },
  "oklch": {
    "l": 0.43967,
    "c": 0.12536,
    "h": 306.2
  },
  "luminance": 0.07719
}

Semantic roles & 50–950 ramp

primary

#643C88

secondary

#8EAE72

accent

#CF5991

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643C88

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

Preview Lab → · Contrast checker → · Palette generator →