#643F80#643F80

#643F80 is a dark, moderate violet. Relative luminance 0.078; OKLCH L 44.0% C 0.110 H 308.8°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#643F80
RGB	rgb(100, 63, 128)
HSL	hsl(274, 34%, 37%)
HSV	hsv(274, 51%, 50%)
CMYK	cmyk(21.9%, 50.8%, 0%, 49.8%)
CIE-LAB	lab(33.61, 29.29, -30.66)
CIE-LCH	lch(33.61, 42.40, 313.69°)
OKLab	oklab(43.98% 0.069 -0.0857)
OKLCH	oklch(43.98% 0.11 308.8)
XYZ	xyz(10.9286, 7.8230, 21.3522)
Luminance	0.0782 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F80 #5B803F

analogous

#443F80 #643F80 #803F7B

triadic

#643F80 #80643F #3F8064

tetradic

#643F80 #80443F #5B803F #3F7B80

square

#643F80 #80443F #5B803F #3F7B80

split-complementary

#643F80 #7B803F #3F8044

monochromatic

#24172E #442B57 #643F80 #8453A9 #A17BBE

Accessibility & contrast

On white

8.19

#643F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F80

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F80	#FFFFFF	#000000	##FFFFFF
##643F80	1.00	8.19	2.56	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4D82

Deuteranopia (green-blind)

#39507E

Tritanopia (blue-blind)

#604A59

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643f80;
/* rgb */ color: rgb(100, 63, 128);
/* oklch */ color: oklch(44.0% 0.110 308.8);

Tailwind

colors: {
  custom: {
    50: '#9275a5',
    500: '#643f80',
    950: '#000000',
  },
}

SCSS

$custom: #643f80;
$custom-light: #9275a5;
$custom-dark: #000000;

JSON

{
  "hex": "#643f80",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 128
  },
  "hsl": {
    "h": 274.154,
    "s": 34.031,
    "l": 37.451
  },
  "oklch": {
    "l": 0.4398,
    "c": 0.10998,
    "h": 308.8
  },
  "luminance": 0.07823
}

Semantic roles & 50–950 ramp

primary

#643F80

secondary

#8AA872

accent

#CA5E8C

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643F80

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

Preview Lab → · Contrast checker → · Palette generator →