#643F7A#643F7A

#643F7A is a dark, moderate violet. Relative luminance 0.077; OKLCH L 43.6% C 0.102 H 311.7°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#643F7A
RGB	rgb(100, 63, 122)
HSL	hsl(278, 32%, 36%)
HSV	hsv(278, 48%, 48%)
CMYK	cmyk(18%, 48.4%, 0%, 52.2%)
CIE-LAB	lab(33.29, 27.82, -27.44)
CIE-LCH	lch(33.29, 39.07, 315.40°)
OKLab	oklab(43.63% 0.0681 -0.0763)
OKLCH	oklch(43.63% 0.102 311.7)
XYZ	xyz(10.5453, 7.6697, 19.3335)
Luminance	0.0767 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F7A #557A3F

analogous

#473F7A #643F7A #7A3F73

triadic

#643F7A #7A643F #3F7A64

tetradic

#643F7A #7A473F #557A3F #3F737A

square

#643F7A #7A473F #557A3F #3F737A

split-complementary

#643F7A #737A3F #3F7A47

monochromatic

#221529 #432A52 #643F7A #8554A2 #A279BA

Accessibility & contrast

On white

8.29

#643F7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#643F7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F7A

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F7A	#FFFFFF	#000000	##FFFFFF
##643F7A	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324C7C

Deuteranopia (green-blind)

#3C4F78

Tritanopia (blue-blind)

#624856

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f7a;
/* rgb */ color: rgb(100, 63, 122);
/* oklch */ color: oklch(43.6% 0.102 311.7);

Tailwind

colors: {
  custom: {
    50: '#9175a1',
    500: '#643f7a',
    950: '#000000',
  },
}

SCSS

$custom: #643f7a;
$custom-light: #9175a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643f7a",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 122
  },
  "hsl": {
    "h": 277.627,
    "s": 31.892,
    "l": 36.275
  },
  "oklch": {
    "l": 0.4363,
    "c": 0.10229,
    "h": 311.7
  },
  "luminance": 0.07669
}

Semantic roles & 50–950 ramp

primary

#643F7A

secondary

#84A470

accent

#C86087

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643F7A

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

Preview Lab → · Contrast checker → · Palette generator →