#643E7B#643E7B

#643E7B is a dark, moderate violet. Relative luminance 0.076; OKLCH L 43.5% C 0.105 H 311.5°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#643E7B
RGB	rgb(100, 62, 123)
HSL	hsl(277, 33%, 36%)
HSV	hsv(277, 50%, 48%)
CMYK	cmyk(18.7%, 49.6%, 0%, 51.8%)
CIE-LAB	lab(33.10, 28.66, -28.35)
CIE-LCH	lch(33.10, 40.31, 315.32°)
OKLab	oklab(43.51% 0.0698 -0.079)
OKLCH	oklch(43.51% 0.105 311.5)
XYZ	xyz(10.5527, 7.5848, 19.6432)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E7B #557B3E

analogous

#463E7B #643E7B #7B3E74

triadic

#643E7B #7B643E #3E7B64

tetradic

#643E7B #7B463E #557B3E #3E747B

square

#643E7B #7B463E #557B3E #3E747B

split-complementary

#643E7B #747B3E #3E7B46

monochromatic

#22152A #432952 #643E7B #8553A4 #A278BB

Accessibility & contrast

On white

8.34

#643E7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#643E7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E7B

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E7B	#FFFFFF	#000000	##FFFFFF
##643E7B	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304C7D

Deuteranopia (green-blind)

#3B4F79

Tritanopia (blue-blind)

#624856

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643e7b;
/* rgb */ color: rgb(100, 62, 123);
/* oklch */ color: oklch(43.5% 0.105 311.5);

Tailwind

colors: {
  custom: {
    50: '#9274a1',
    500: '#643e7b',
    950: '#000000',
  },
}

SCSS

$custom: #643e7b;
$custom-light: #9274a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643e7b",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 123
  },
  "hsl": {
    "h": 277.377,
    "s": 32.973,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43512,
    "c": 0.10538,
    "h": 311.5
  },
  "luminance": 0.07585
}

Semantic roles & 50–950 ramp

primary

#643E7B

secondary

#84A56F

accent

#C95F87

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643E7B

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

Preview Lab → · Contrast checker → · Palette generator →