#643F7F#643F7F

#643F7F is a dark, moderate violet. Relative luminance 0.078; OKLCH L 43.9% C 0.109 H 309.3°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#643F7F
RGB	rgb(100, 63, 127)
HSL	hsl(275, 34%, 37%)
HSV	hsv(275, 50%, 50%)
CMYK	cmyk(21.3%, 50.4%, 0%, 50.2%)
CIE-LAB	lab(33.56, 29.04, -30.13)
CIE-LCH	lch(33.56, 41.85, 313.95°)
OKLab	oklab(43.92% 0.0688 -0.0841)
OKLCH	oklch(43.92% 0.109 309.3)
XYZ	xyz(10.8631, 7.7968, 21.0072)
Luminance	0.0780 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F7F #5A7F3F

analogous

#443F7F #643F7F #7F3F7A

triadic

#643F7F #7F643F #3F7F64

tetradic

#643F7F #7F443F #5A7F3F #3F7A7F

square

#643F7F #7F443F #5A7F3F #3F7A7F

split-complementary

#643F7F #7A7F3F #3F7F44

monochromatic

#24162D #442B56 #643F7F #8453A8 #A17BBD

Accessibility & contrast

On white

8.21

#643F7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#643F7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F7F

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F7F	#FFFFFF	#000000	##FFFFFF
##643F7F	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4D81

Deuteranopia (green-blind)

#394F7D

Tritanopia (blue-blind)

#604A59

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #643f7f;
/* rgb */ color: rgb(100, 63, 127);
/* oklch */ color: oklch(43.9% 0.109 309.3);

Tailwind

colors: {
  custom: {
    50: '#9275a4',
    500: '#643f7f',
    950: '#000000',
  },
}

SCSS

$custom: #643f7f;
$custom-light: #9275a4;
$custom-dark: #000000;

JSON

{
  "hex": "#643f7f",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 127
  },
  "hsl": {
    "h": 274.688,
    "s": 33.684,
    "l": 37.255
  },
  "oklch": {
    "l": 0.4392,
    "c": 0.10869,
    "h": 309.3
  },
  "luminance": 0.07797
}

Semantic roles & 50–950 ramp

primary

#643F7F

secondary

#89A872

accent

#CA5E8B

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643F7F

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

Preview Lab → · Contrast checker → · Palette generator →