#643F8B#643F8B

#643F8B is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.7% C 0.124 H 304.3°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#643F8B
RGB	rgb(100, 63, 139)
HSL	hsl(269, 38%, 40%)
HSV	hsv(269, 55%, 55%)
CMYK	cmyk(28.1%, 54.7%, 0%, 45.5%)
CIE-LAB	lab(34.25, 32.08, -36.44)
CIE-LCH	lch(34.25, 48.55, 311.36°)
OKLab	oklab(44.66% 0.07 -0.1025)
OKLCH	oklch(44.66% 0.124 304.3)
XYZ	xyz(11.6922, 8.1285, 25.3741)
Luminance	0.0813 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F8B #668B3F

analogous

#3F408B #643F8B #8A3F8B

triadic

#643F8B #8B643F #3F8B64

tetradic

#643F8B #8B3F40 #668B3F #3F8B8A

square

#643F8B #8B3F40 #668B3F #3F8B8A

split-complementary

#643F8B #8B8A3F #408B3F

monochromatic

#271937 #462C61 #643F8B #8255B2 #A17FC5

Accessibility & contrast

On white

8.00

#643F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#643F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F8B

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F8B	#FFFFFF	#000000	##FFFFFF
##643F8B	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25508E

Deuteranopia (green-blind)

#315189

Tritanopia (blue-blind)

#5D4D5F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #643f8b;
/* rgb */ color: rgb(100, 63, 139);
/* oklch */ color: oklch(44.7% 0.124 304.3);

Tailwind

colors: {
  custom: {
    50: '#9275ad',
    500: '#643f8b',
    950: '#000000',
  },
}

SCSS

$custom: #643f8b;
$custom-light: #9275ad;
$custom-dark: #000000;

JSON

{
  "hex": "#643f8b",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 139
  },
  "hsl": {
    "h": 269.211,
    "s": 37.624,
    "l": 39.608
  },
  "oklch": {
    "l": 0.44659,
    "c": 0.12417,
    "h": 304.3
  },
  "luminance": 0.08128
}

Semantic roles & 50–950 ramp

primary

#643F8B

secondary

#94AF76

accent

#CE5A95

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643F8B

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

Preview Lab → · Contrast checker → · Palette generator →