#643C90#643C90

#643C90 is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.5% C 0.135 H 303.3°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#643C90
RGB	rgb(100, 60, 144)
HSL	hsl(269, 41%, 40%)
HSV	hsv(269, 58%, 56%)
CMYK	cmyk(30.6%, 58.3%, 0%, 43.5%)
CIE-LAB	lab(33.89, 35.13, -40.08)
CIE-LCH	lch(33.89, 53.30, 311.23°)
OKLab	oklab(44.49% 0.0744 -0.1132)
OKLCH	oklch(44.49% 0.135 303.3)
XYZ	xyz(11.9043, 7.9547, 27.2884)
Luminance	0.0795 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C90 #68903C

analogous

#3C3E90 #643C90 #8E3C90

triadic

#643C90 #90643C #3C9064

tetradic

#643C90 #903C3E #68903C #3C908E

square

#643C90 #903C3E #68903C #3C908E

split-complementary

#643C90 #908E3C #3E903C

monochromatic

#28183A #462A65 #643C90 #8252B7 #A17DC9

Accessibility & contrast

On white

8.10

#643C90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#643C90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C90

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C90	#FFFFFF	#000000	##FFFFFF
##643C90	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194F93

Deuteranopia (green-blind)

#29508E

Tritanopia (blue-blind)

#5C4C60

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643c90;
/* rgb */ color: rgb(100, 60, 144);
/* oklch */ color: oklch(44.5% 0.135 303.3);

Tailwind

colors: {
  custom: {
    50: '#9373b1',
    500: '#643c90',
    950: '#000000',
  },
}

SCSS

$custom: #643c90;
$custom-light: #9373b1;
$custom-dark: #000000;

JSON

{
  "hex": "#643c90",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 144
  },
  "hsl": {
    "h": 268.571,
    "s": 41.176,
    "l": 40
  },
  "oklch": {
    "l": 0.44494,
    "c": 0.13546,
    "h": 303.3
  },
  "luminance": 0.07955
}

Semantic roles & 50–950 ramp

primary

#643C90

secondary

#95B375

accent

#D15797

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643C90

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

Preview Lab → · Contrast checker → · Palette generator →