#643A8E#643A8E

#643A8E is a dark, vivid violet. Relative luminance 0.077; OKLCH L 44.0% C 0.136 H 304.5°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#643A8E
RGB	rgb(100, 58, 142)
HSL	hsl(270, 42%, 39%)
HSV	hsv(270, 59%, 56%)
CMYK	cmyk(29.6%, 59.2%, 0%, 44.3%)
CIE-LAB	lab(33.33, 35.76, -39.76)
CIE-LCH	lch(33.33, 53.47, 311.97°)
OKLab	oklab(44.04% 0.077 -0.1122)
OKLCH	oklch(44.04% 0.136 304.5)
XYZ	xyz(11.6500, 7.6885, 26.4562)
Luminance	0.0769 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A8E #648E3A

analogous

#3A3A8E #643A8E #8E3A8E

triadic

#643A8E #8E643A #3A8E64

tetradic

#643A8E #8E3A3A #648E3A #3A8E8E

square

#643A8E #8E3A3A #648E3A #3A8E8E

split-complementary

#643A8E #8E8E3A #3A8E3A

monochromatic

#271737 #452863 #643A8E #834EB7 #A17AC9

Accessibility & contrast

On white

8.28

#643A8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#643A8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A8E

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A8E	#FFFFFF	#000000	##FFFFFF
##643A8E	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174D91

Deuteranopia (green-blind)

#284E8C

Tritanopia (blue-blind)

#5D4A5E

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643a8e;
/* rgb */ color: rgb(100, 58, 142);
/* oklch */ color: oklch(44.0% 0.136 304.5);

Tailwind

colors: {
  custom: {
    50: '#9372af',
    500: '#643a8e',
    950: '#000000',
  },
}

SCSS

$custom: #643a8e;
$custom-light: #9372af;
$custom-dark: #000000;

JSON

{
  "hex": "#643a8e",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 142
  },
  "hsl": {
    "h": 270,
    "s": 42,
    "l": 39.216
  },
  "oklch": {
    "l": 0.4404,
    "c": 0.13614,
    "h": 304.5
  },
  "luminance": 0.07688
}

Semantic roles & 50–950 ramp

primary

#643A8E

secondary

#92B272

accent

#D25694

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A8E

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

Preview Lab → · Contrast checker → · Palette generator →