#643D7C#643D7C

#643D7C is a dark, moderate violet. Relative luminance 0.075; OKLCH L 43.4% C 0.108 H 311.2°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#643D7C
RGB	rgb(100, 61, 124)
HSL	hsl(277, 34%, 36%)
HSV	hsv(277, 51%, 49%)
CMYK	cmyk(19.4%, 50.8%, 0%, 51.4%)
CIE-LAB	lab(32.92, 29.50, -29.26)
CIE-LCH	lch(32.92, 41.55, 315.24°)
OKLab	oklab(43.4% 0.0715 -0.0816)
OKLCH	oklch(43.4% 0.108 311.2)
XYZ	xyz(10.5617, 7.5023, 19.9566)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D7C #557C3D

analogous

#453D7C #643D7C #7C3D75

triadic

#643D7C #7C643D #3D7C64

tetradic

#643D7C #7C453D #557C3D #3D757C

square

#643D7C #7C453D #557C3D #3D757C

split-complementary

#643D7C #757C3D #3D7C45

monochromatic

#22152A #432953 #643D7C #8551A5 #A277BC

Accessibility & contrast

On white

8.40

#643D7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#643D7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D7C

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D7C	#FFFFFF	#000000	##FFFFFF
##643D7C	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4B7E

Deuteranopia (green-blind)

#394E7A

Tritanopia (blue-blind)

#614756

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643d7c;
/* rgb */ color: rgb(100, 61, 124);
/* oklch */ color: oklch(43.4% 0.108 311.2);

Tailwind

colors: {
  custom: {
    50: '#9274a2',
    500: '#643d7c',
    950: '#000000',
  },
}

SCSS

$custom: #643d7c;
$custom-light: #9274a2;
$custom-dark: #000000;

JSON

{
  "hex": "#643d7c",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 124
  },
  "hsl": {
    "h": 277.143,
    "s": 34.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43397,
    "c": 0.10846,
    "h": 311.2
  },
  "luminance": 0.07502
}

Semantic roles & 50–950 ramp

primary

#643D7C

secondary

#84A66F

accent

#CA5E87

background

#F9F7FA

surface

#F1EDF3

border

#CBC8CD

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643D7C

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

Preview Lab → · Contrast checker → · Palette generator →