#643A7C#643A7C

#643A7C is a dark, moderate violet. Relative luminance 0.072; OKLCH L 42.9% C 0.114 H 311.9°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#643A7C
RGB	rgb(100, 58, 124)
HSL	hsl(278, 36%, 36%)
HSV	hsv(278, 53%, 49%)
CMYK	cmyk(19.4%, 53.2%, 0%, 51.4%)
CIE-LAB	lab(32.24, 31.27, -30.34)
CIE-LCH	lch(32.24, 43.57, 315.87°)
OKLab	oklab(42.89% 0.076 -0.0847)
OKLCH	oklch(42.89% 0.114 311.9)
XYZ	xyz(10.4060, 7.1909, 19.9047)
Luminance	0.0719 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A7C #527C3A

analogous

#433A7C #643A7C #7C3A73

triadic

#643A7C #7C643A #3A7C64

tetradic

#643A7C #7C433A #527C3A #3A737C

square

#643A7C #7C433A #527C3A #3A737C

split-complementary

#643A7C #737C3A #3A7C43

monochromatic

#211329 #422652 #643A7C #864EA6 #A273BD

Accessibility & contrast

On white

8.61

#643A7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#643A7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A7C

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A7C	#FFFFFF	#000000	##FFFFFF
##643A7C	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294A7E

Deuteranopia (green-blind)

#364D7A

Tritanopia (blue-blind)

#614555

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643a7c;
/* rgb */ color: rgb(100, 58, 124);
/* oklch */ color: oklch(42.9% 0.114 311.9);

Tailwind

colors: {
  custom: {
    50: '#9272a2',
    500: '#643a7c',
    950: '#000000',
  },
}

SCSS

$custom: #643a7c;
$custom-light: #9272a2;
$custom-dark: #000000;

JSON

{
  "hex": "#643a7c",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 124
  },
  "hsl": {
    "h": 278.182,
    "s": 36.264,
    "l": 35.686
  },
  "oklch": {
    "l": 0.42887,
    "c": 0.11381,
    "h": 311.9
  },
  "luminance": 0.07191
}

Semantic roles & 50–950 ramp

primary

#643A7C

secondary

#81A76B

accent

#CC5C85

background

#F9F6FA

surface

#F1ECF3

border

#CBC7CD

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643A7C

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

Preview Lab → · Contrast checker → · Palette generator →