#643D9B#643D9B

#643D9B is a mid, vivid violet. Relative luminance 0.084; OKLCH L 45.4% C 0.148 H 299.6°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#643D9B
RGB	rgb(100, 61, 155)
HSL	hsl(265, 44%, 42%)
HSV	hsv(265, 61%, 61%)
CMYK	cmyk(35.5%, 60.6%, 0%, 39.2%)
CIE-LAB	lab(34.83, 37.46, -45.27)
CIE-LCH	lch(34.83, 58.76, 309.61°)
OKLab	oklab(45.41% 0.073 -0.1284)
OKLCH	oklch(45.41% 0.148 299.6)
XYZ	xyz(12.8392, 8.4133, 31.9515)
Luminance	0.0841 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D9B #749B3D

analogous

#3D459B #643D9B #933D9B

triadic

#643D9B #9B643D #3D9B64

tetradic

#643D9B #9B3D45 #749B3D #3D9B93

square

#643D9B #9B3D45 #749B3D #3D9B93

split-complementary

#643D9B #9B933D #459B3D

monochromatic

#2B1A43 #482C6F #643D9B #8258BD #A384CF

Accessibility & contrast

On white

7.83

#643D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#643D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D9B

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D9B	#FFFFFF	#000000	##FFFFFF
##643D9B	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05529E

Deuteranopia (green-blind)

#1D5199

Tritanopia (blue-blind)

#585166

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #643d9b;
/* rgb */ color: rgb(100, 61, 155);
/* oklch */ color: oklch(45.4% 0.148 299.6);

Tailwind

colors: {
  custom: {
    50: '#9474b9',
    500: '#643d9b',
    950: '#000000',
  },
}

SCSS

$custom: #643d9b;
$custom-light: #9474b9;
$custom-dark: #000000;

JSON

{
  "hex": "#643d9b",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 155
  },
  "hsl": {
    "h": 264.894,
    "s": 43.519,
    "l": 42.353
  },
  "oklch": {
    "l": 0.45414,
    "c": 0.14774,
    "h": 299.6
  },
  "luminance": 0.08413
}

Semantic roles & 50–950 ramp

primary

#643D9B

secondary

#9FB97B

accent

#D3559F

background

#F9F7FB

surface

#F2EDF6

border

#CCC8D0

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643D9B

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

Preview Lab → · Contrast checker → · Palette generator →