#643B89#643B89

#643B89 is a dark, vivid violet. Relative luminance 0.076; OKLCH L 43.9% C 0.128 H 306.1°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#643B89
RGB	rgb(100, 59, 137)
HSL	hsl(272, 40%, 38%)
HSV	hsv(272, 57%, 54%)
CMYK	cmyk(27%, 56.9%, 0%, 46.3%)
CIE-LAB	lab(33.23, 33.91, -36.84)
CIE-LCH	lch(33.23, 50.07, 312.63°)
OKLab	oklab(43.87% 0.0755 -0.1037)
OKLCH	oklch(43.87% 0.128 306.1)
XYZ	xyz(11.3339, 7.6435, 24.5403)
Luminance	0.0764 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B89 #60893B

analogous

#3D3B89 #643B89 #893B87

triadic

#643B89 #89643B #3B8964

tetradic

#643B89 #893D3B #60893B #3B8789

square

#643B89 #893D3B #60893B #3B8789

split-complementary

#643B89 #87893B #3B893D

monochromatic

#261633 #45295E #643B89 #834EB3 #A179C5

Accessibility & contrast

On white

8.30

#643B89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#643B89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B89

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B89	#FFFFFF	#000000	##FFFFFF
##643B89	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204D8C

Deuteranopia (green-blind)

#2E4E87

Tritanopia (blue-blind)

#5E4A5C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643b89;
/* rgb */ color: rgb(100, 59, 137);
/* oklch */ color: oklch(43.9% 0.128 306.1);

Tailwind

colors: {
  custom: {
    50: '#9373ac',
    500: '#643b89',
    950: '#000000',
  },
}

SCSS

$custom: #643b89;
$custom-light: #9373ac;
$custom-dark: #000000;

JSON

{
  "hex": "#643b89",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 137
  },
  "hsl": {
    "h": 271.538,
    "s": 39.796,
    "l": 38.431
  },
  "oklch": {
    "l": 0.43868,
    "c": 0.12828,
    "h": 306.1
  },
  "luminance": 0.07643
}

Semantic roles & 50–950 ramp

primary

#643B89

secondary

#8EAF71

accent

#D05891

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643B89

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

Preview Lab → · Contrast checker → · Palette generator →