#643B90#643B90

#643B90 is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.3% C 0.137 H 303.5°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#643B90
RGB	rgb(100, 59, 144)
HSL	hsl(269, 42%, 40%)
HSV	hsv(269, 59%, 56%)
CMYK	cmyk(30.6%, 59%, 0%, 43.5%)
CIE-LAB	lab(33.67, 35.70, -40.43)
CIE-LCH	lch(33.67, 53.94, 311.45°)
OKLab	oklab(44.33% 0.0757 -0.1142)
OKLCH	oklch(44.33% 0.137 303.5)
XYZ	xyz(11.8524, 7.8509, 27.2711)
Luminance	0.0785 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B90 #67903B

analogous

#3B3D90 #643B90 #8F3B90

triadic

#643B90 #90643B #3B9064

tetradic

#643B90 #903B3D #67903B #3B908F

square

#643B90 #903B3D #67903B #3B908F

split-complementary

#643B90 #908F3B #3D903B

monochromatic

#281739 #462965 #643B90 #8251B8 #A17CC9

Accessibility & contrast

On white

8.17

#643B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#643B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B90

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B90	#FFFFFF	#000000	##FFFFFF
##643B90	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174E93

Deuteranopia (green-blind)

#284F8E

Tritanopia (blue-blind)

#5C4C5F

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643b90;
/* rgb */ color: rgb(100, 59, 144);
/* oklch */ color: oklch(44.3% 0.137 303.5);

Tailwind

colors: {
  custom: {
    50: '#9373b1',
    500: '#643b90',
    950: '#000000',
  },
}

SCSS

$custom: #643b90;
$custom-light: #9373b1;
$custom-dark: #000000;

JSON

{
  "hex": "#643b90",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 144
  },
  "hsl": {
    "h": 268.941,
    "s": 41.872,
    "l": 39.804
  },
  "oklch": {
    "l": 0.44334,
    "c": 0.13705,
    "h": 303.5
  },
  "luminance": 0.07851
}

Semantic roles & 50–950 ramp

primary

#643B90

secondary

#95B374

accent

#D25696

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643B90

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

Preview Lab → · Contrast checker → · Palette generator →