#643E8B#643E8B

#643E8B is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.5% C 0.126 H 304.6°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#643E8B
RGB	rgb(100, 62, 139)
HSL	hsl(270, 38%, 39%)
HSV	hsv(270, 55%, 55%)
CMYK	cmyk(28.1%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(34.02, 32.67, -36.80)
CIE-LCH	lch(34.02, 49.21, 311.59°)
OKLab	oklab(44.49% 0.0714 -0.1036)
OKLCH	oklch(44.49% 0.126 304.6)
XYZ	xyz(11.6373, 8.0187, 25.3558)
Luminance	0.0802 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E8B #658B3E

analogous

#3E3F8B #643E8B #8A3E8B

triadic

#643E8B #8B643E #3E8B64

tetradic

#643E8B #8B3E3F #658B3E #3E8B8A

square

#643E8B #8B3E3F #658B3E #3E8B8A

split-complementary

#643E8B #8B8A3E #3F8B3E

monochromatic

#271836 #462B61 #643E8B #8254B3 #A17EC5

Accessibility & contrast

On white

8.07

#643E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#643E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E8B

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E8B	#FFFFFF	#000000	##FFFFFF
##643E8B	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234F8E

Deuteranopia (green-blind)

#305089

Tritanopia (blue-blind)

#5D4C5E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643e8b;
/* rgb */ color: rgb(100, 62, 139);
/* oklch */ color: oklch(44.5% 0.126 304.6);

Tailwind

colors: {
  custom: {
    50: '#9375ad',
    500: '#643e8b',
    950: '#000000',
  },
}

SCSS

$custom: #643e8b;
$custom-light: #9375ad;
$custom-dark: #000000;

JSON

{
  "hex": "#643e8b",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 269.61,
    "s": 38.308,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44491,
    "c": 0.12584,
    "h": 304.6
  },
  "luminance": 0.08019
}

Semantic roles & 50–950 ramp

primary

#643E8B

secondary

#93B075

accent

#CE5A95

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643E8B

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

Preview Lab → · Contrast checker → · Palette generator →