#643E87#643E87

#643E87 is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.2% C 0.121 H 306.1°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#643E87
RGB	rgb(100, 62, 135)
HSL	hsl(271, 37%, 39%)
HSV	hsv(271, 54%, 53%)
CMYK	cmyk(25.9%, 54.1%, 0%, 47.1%)
CIE-LAB	lab(33.78, 31.65, -34.72)
CIE-LCH	lch(33.78, 46.98, 312.35°)
OKLab	oklab(44.24% 0.0711 -0.0975)
OKLCH	oklch(44.24% 0.121 306.1)
XYZ	xyz(11.3504, 7.9039, 23.8446)
Luminance	0.0790 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E87 #61873E

analogous

#3F3E87 #643E87 #873E85

triadic

#643E87 #87643E #3E8764

tetradic

#643E87 #873F3E #61873E #3E8587

square

#643E87 #873F3E #61873E #3E8587

split-complementary

#643E87 #85873E #3E873F

monochromatic

#261733 #452B5D #643E87 #8352B0 #A17CC3

Accessibility & contrast

On white

8.14

#643E87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#643E87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E87

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E87	#FFFFFF	#000000	##FFFFFF
##643E87	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274E89

Deuteranopia (green-blind)

#335085

Tritanopia (blue-blind)

#5E4B5C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643e87;
/* rgb */ color: rgb(100, 62, 135);
/* oklch */ color: oklch(44.2% 0.121 306.1);

Tailwind

colors: {
  custom: {
    50: '#9274aa',
    500: '#643e87',
    950: '#000000',
  },
}

SCSS

$custom: #643e87;
$custom-light: #9274aa;
$custom-dark: #000000;

JSON

{
  "hex": "#643e87",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 135
  },
  "hsl": {
    "h": 271.233,
    "s": 37.056,
    "l": 38.627
  },
  "oklch": {
    "l": 0.44237,
    "c": 0.12071,
    "h": 306.1
  },
  "luminance": 0.07904
}

Semantic roles & 50–950 ramp

primary

#643E87

secondary

#8FAD74

accent

#CD5B92

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643E87

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

Preview Lab → · Contrast checker → · Palette generator →