#643F79#643F79

#643F79 is a dark, moderate violet. Relative luminance 0.076; OKLCH L 43.6% C 0.101 H 312.3°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#643F79
RGB	rgb(100, 63, 121)
HSL	hsl(278, 32%, 36%)
HSV	hsv(278, 48%, 47%)
CMYK	cmyk(17.4%, 47.9%, 0%, 52.5%)
CIE-LAB	lab(33.23, 27.58, -26.90)
CIE-LCH	lch(33.23, 38.52, 315.72°)
OKLab	oklab(43.57% 0.0679 -0.0748)
OKLCH	oklch(43.57% 0.101 312.3)
XYZ	xyz(10.4836, 7.6450, 19.0088)
Luminance	0.0765 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F79 #54793F

analogous

#473F79 #643F79 #793F71

triadic

#643F79 #79643F #3F7964

tetradic

#643F79 #79473F #54793F #3F7179

square

#643F79 #79473F #54793F #3F7179

split-complementary

#643F79 #71793F #3F7947

monochromatic

#211529 #432A51 #643F79 #8554A1 #A279B9

Accessibility & contrast

On white

8.30

#643F79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#643F79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F79

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F79	#FFFFFF	#000000	##FFFFFF
##643F79	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334C7B

Deuteranopia (green-blind)

#3D4F77

Tritanopia (blue-blind)

#624856

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f79;
/* rgb */ color: rgb(100, 63, 121);
/* oklch */ color: oklch(43.6% 0.101 312.3);

Tailwind

colors: {
  custom: {
    50: '#9175a0',
    500: '#643f79',
    950: '#000000',
  },
}

SCSS

$custom: #643f79;
$custom-light: #9175a0;
$custom-dark: #000000;

JSON

{
  "hex": "#643f79",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 121
  },
  "hsl": {
    "h": 278.276,
    "s": 31.522,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43574,
    "c": 0.10101,
    "h": 312.3
  },
  "luminance": 0.07645
}

Semantic roles & 50–950 ramp

primary

#643F79

secondary

#83A470

accent

#C86086

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F79

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

Preview Lab → · Contrast checker → · Palette generator →