#643D7B#643D7B

#643D7B is a dark, moderate violet. Relative luminance 0.075; OKLCH L 43.3% C 0.107 H 311.7°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#643D7B
RGB	rgb(100, 61, 123)
HSL	hsl(278, 34%, 36%)
HSV	hsv(278, 50%, 48%)
CMYK	cmyk(18.7%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(32.87, 29.26, -28.72)
CIE-LCH	lch(32.87, 41.00, 315.54°)
OKLab	oklab(43.34% 0.0713 -0.08)
OKLCH	oklch(43.34% 0.107 311.7)
XYZ	xyz(10.4988, 7.4771, 19.6252)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D7B #547B3D

analogous

#453D7B #643D7B #7B3D73

triadic

#643D7B #7B643D #3D7B64

tetradic

#643D7B #7B453D #547B3D #3D737B

square

#643D7B #7B453D #547B3D #3D737B

split-complementary

#643D7B #737B3D #3D7B45

monochromatic

#211429 #432952 #643D7B #8551A4 #A277BC

Accessibility & contrast

On white

8.42

#643D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#643D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D7B

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D7B	#FFFFFF	#000000	##FFFFFF
##643D7B	1.00	8.42	2.50	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4B7D

Deuteranopia (green-blind)

#3A4E79

Tritanopia (blue-blind)

#624756

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643d7b;
/* rgb */ color: rgb(100, 61, 123);
/* oklch */ color: oklch(43.3% 0.107 311.7);

Tailwind

colors: {
  custom: {
    50: '#9274a1',
    500: '#643d7b',
    950: '#000000',
  },
}

SCSS

$custom: #643d7b;
$custom-light: #9274a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643d7b",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 277.742,
    "s": 33.696,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43338,
    "c": 0.1072,
    "h": 311.7
  },
  "luminance": 0.07477
}

Semantic roles & 50–950 ramp

primary

#643D7B

secondary

#83A66E

accent

#CA5E86

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643D7B

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

Preview Lab → · Contrast checker → · Palette generator →