#643A89#643A89

#643A89 is a dark, vivid violet. Relative luminance 0.075; OKLCH L 43.7% C 0.130 H 306.3°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#643A89
RGB	rgb(100, 58, 137)
HSL	hsl(272, 41%, 38%)
HSV	hsv(272, 58%, 54%)
CMYK	cmyk(27%, 57.7%, 0%, 46.3%)
CIE-LAB	lab(33.01, 34.49, -37.19)
CIE-LCH	lch(33.01, 50.72, 312.84°)
OKLab	oklab(43.71% 0.0769 -0.1047)
OKLCH	oklch(43.71% 0.13 306.3)
XYZ	xyz(11.2830, 7.5417, 24.5233)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A89 #5F893A

analogous

#3C3A89 #643A89 #893A86

triadic

#643A89 #89643A #3A8964

tetradic

#643A89 #893C3A #5F893A #3A8689

square

#643A89 #893C3A #5F893A #3A8689

split-complementary

#643A89 #86893A #3A893C

monochromatic

#251633 #45285E #643A89 #834DB4 #A178C6

Accessibility & contrast

On white

8.37

#643A89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643A89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A89

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A89	#FFFFFF	#000000	##FFFFFF
##643A89	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4C8C

Deuteranopia (green-blind)

#2D4E87

Tritanopia (blue-blind)

#5E495C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643a89;
/* rgb */ color: rgb(100, 58, 137);
/* oklch */ color: oklch(43.7% 0.130 306.3);

Tailwind

colors: {
  custom: {
    50: '#9372ac',
    500: '#643a89',
    950: '#000000',
  },
}

SCSS

$custom: #643a89;
$custom-light: #9372ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643a89",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 137
  },
  "hsl": {
    "h": 271.899,
    "s": 40.513,
    "l": 38.235
  },
  "oklch": {
    "l": 0.43707,
    "c": 0.12994,
    "h": 306.3
  },
  "luminance": 0.07542
}

Semantic roles & 50–950 ramp

primary

#643A89

secondary

#8DAF70

accent

#D05790

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A89

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

Preview Lab → · Contrast checker → · Palette generator →