#643F87#643F87

#643F87 is a dark, moderate violet. Relative luminance 0.080; OKLCH L 44.4% C 0.119 H 305.9°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#643F87
RGB	rgb(100, 63, 135)
HSL	hsl(271, 36%, 39%)
HSV	hsv(271, 53%, 53%)
CMYK	cmyk(25.9%, 53.3%, 0%, 47.1%)
CIE-LAB	lab(34.01, 31.05, -34.36)
CIE-LCH	lch(34.01, 46.31, 312.11°)
OKLab	oklab(44.41% 0.0697 -0.0965)
OKLCH	oklch(44.41% 0.119 305.9)
XYZ	xyz(11.4053, 8.0137, 23.8629)
Luminance	0.0801 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F87 #62873F

analogous

#403F87 #643F87 #873F86

triadic

#643F87 #87643F #3F8764

tetradic

#643F87 #87403F #62873F #3F8687

square

#643F87 #87403F #62873F #3F8687

split-complementary

#643F87 #86873F #3F8740

monochromatic

#261834 #452C5D #643F87 #8354AF #A17EC3

Accessibility & contrast

On white

8.07

#643F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#643F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F87

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F87	#FFFFFF	#000000	##FFFFFF
##643F87	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294F89

Deuteranopia (green-blind)

#345085

Tritanopia (blue-blind)

#5E4C5D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643f87;
/* rgb */ color: rgb(100, 63, 135);
/* oklch */ color: oklch(44.4% 0.119 305.9);

Tailwind

colors: {
  custom: {
    50: '#9275aa',
    500: '#643f87',
    950: '#000000',
  },
}

SCSS

$custom: #643f87;
$custom-light: #9275aa;
$custom-dark: #000000;

JSON

{
  "hex": "#643f87",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 135
  },
  "hsl": {
    "h": 270.833,
    "s": 36.364,
    "l": 38.824
  },
  "oklch": {
    "l": 0.44407,
    "c": 0.11901,
    "h": 305.9
  },
  "luminance": 0.08014
}

Semantic roles & 50–950 ramp

primary

#643F87

secondary

#90AD75

accent

#CC5B92

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643F87

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

Preview Lab → · Contrast checker → · Palette generator →