#643D7D#643D7D

#643D7D is a dark, moderate violet. Relative luminance 0.075; OKLCH L 43.5% C 0.110 H 310.7°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#643D7D
RGB	rgb(100, 61, 125)
HSL	hsl(277, 34%, 36%)
HSV	hsv(277, 51%, 49%)
CMYK	cmyk(20%, 51.2%, 0%, 51%)
CIE-LAB	lab(32.98, 29.75, -29.79)
CIE-LCH	lch(32.98, 42.10, 314.96°)
OKLab	oklab(43.46% 0.0716 -0.0831)
OKLCH	oklch(43.46% 0.11 310.7)
XYZ	xyz(10.6253, 7.5277, 20.2913)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D7D #567D3D

analogous

#443D7D #643D7D #7D3D76

triadic

#643D7D #7D643D #3D7D64

tetradic

#643D7D #7D443D #567D3D #3D767D

square

#643D7D #7D443D #567D3D #3D767D

split-complementary

#643D7D #767D3D #3D7D44

monochromatic

#22152B #432954 #643D7D #8551A6 #A278BD

Accessibility & contrast

On white

8.38

#643D7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#643D7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D7D

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D7D	#FFFFFF	#000000	##FFFFFF
##643D7D	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4C7F

Deuteranopia (green-blind)

#384E7B

Tritanopia (blue-blind)

#614757

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643d7d;
/* rgb */ color: rgb(100, 61, 125);
/* oklch */ color: oklch(43.5% 0.110 310.7);

Tailwind

colors: {
  custom: {
    50: '#9274a3',
    500: '#643d7d',
    950: '#000000',
  },
}

SCSS

$custom: #643d7d;
$custom-light: #9274a3;
$custom-dark: #000000;

JSON

{
  "hex": "#643d7d",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 125
  },
  "hsl": {
    "h": 276.563,
    "s": 34.409,
    "l": 36.471
  },
  "oklch": {
    "l": 0.43456,
    "c": 0.10972,
    "h": 310.7
  },
  "luminance": 0.07527
}

Semantic roles & 50–950 ramp

primary

#643D7D

secondary

#85A76F

accent

#CA5D88

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643D7D

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

Preview Lab → · Contrast checker → · Palette generator →