#643A90#643A90

#643A90 is a dark, vivid violet. Relative luminance 0.077; OKLCH L 44.2% C 0.139 H 303.8°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#643A90
RGB	rgb(100, 58, 144)
HSL	hsl(269, 43%, 40%)
HSV	hsv(269, 60%, 56%)
CMYK	cmyk(30.6%, 59.7%, 0%, 43.5%)
CIE-LAB	lab(33.45, 36.27, -40.78)
CIE-LCH	lch(33.45, 54.58, 311.66°)
OKLab	oklab(44.18% 0.077 -0.1152)
OKLCH	oklch(44.18% 0.139 303.8)
XYZ	xyz(11.8015, 7.7491, 27.2541)
Luminance	0.0775 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A90 #66903A

analogous

#3A3B90 #643A90 #8F3A90

triadic

#643A90 #90643A #3A9064

tetradic

#643A90 #903A3B #66903A #3A908F

square

#643A90 #903A3B #66903A #3A908F

split-complementary

#643A90 #908F3A #3B903A

monochromatic

#271739 #462864 #643A90 #824FB8 #A17BCA

Accessibility & contrast

On white

8.24

#643A90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#643A90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A90

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A90	#FFFFFF	#000000	##FFFFFF
##643A90	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144E93

Deuteranopia (green-blind)

#264F8E

Tritanopia (blue-blind)

#5C4B5F

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643a90;
/* rgb */ color: rgb(100, 58, 144);
/* oklch */ color: oklch(44.2% 0.139 303.8);

Tailwind

colors: {
  custom: {
    50: '#9372b1',
    500: '#643a90',
    950: '#000000',
  },
}

SCSS

$custom: #643a90;
$custom-light: #9372b1;
$custom-dark: #000000;

JSON

{
  "hex": "#643a90",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 144
  },
  "hsl": {
    "h": 269.302,
    "s": 42.574,
    "l": 39.608
  },
  "oklch": {
    "l": 0.44176,
    "c": 0.13863,
    "h": 303.8
  },
  "luminance": 0.07749
}

Semantic roles & 50–950 ramp

primary

#643A90

secondary

#94B373

accent

#D25595

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643A90

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

Preview Lab → · Contrast checker → · Palette generator →