#643B82#643B82

#643B82 is a dark, moderate violet. Relative luminance 0.074; OKLCH L 43.4% C 0.120 H 308.9°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#643B82
RGB	rgb(100, 59, 130)
HSL	hsl(275, 38%, 37%)
HSV	hsv(275, 55%, 51%)
CMYK	cmyk(23.1%, 54.6%, 0%, 49%)
CIE-LAB	lab(32.81, 32.15, -33.17)
CIE-LCH	lch(32.81, 46.20, 314.11°)
OKLab	oklab(43.42% 0.0751 -0.093)
OKLCH	oklch(43.42% 0.12 308.9)
XYZ	xyz(10.8480, 7.4491, 21.9811)
Luminance	0.0745 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B82 #59823B

analogous

#413B82 #643B82 #823B7D

triadic

#643B82 #82643B #3B8264

tetradic

#643B82 #82413B #59823B #3B7D82

square

#643B82 #82413B #59823B #3B7D82

split-complementary

#643B82 #7D823B #3B8241

monochromatic

#23152E #442858 #643B82 #844EAC #A176C1

Accessibility & contrast

On white

8.43

#643B82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#643B82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B82

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B82	#FFFFFF	#000000	##FFFFFF
##643B82	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264B84

Deuteranopia (green-blind)

#334E80

Tritanopia (blue-blind)

#604758

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643b82;
/* rgb */ color: rgb(100, 59, 130);
/* oklch */ color: oklch(43.4% 0.120 308.9);

Tailwind

colors: {
  custom: {
    50: '#9272a7',
    500: '#643b82',
    950: '#000000',
  },
}

SCSS

$custom: #643b82;
$custom-light: #9272a7;
$custom-dark: #000000;

JSON

{
  "hex": "#643b82",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 130
  },
  "hsl": {
    "h": 274.648,
    "s": 37.566,
    "l": 37.059
  },
  "oklch": {
    "l": 0.43422,
    "c": 0.11952,
    "h": 308.9
  },
  "luminance": 0.07449
}

Semantic roles & 50–950 ramp

primary

#643B82

secondary

#88AB6E

accent

#CE5A8B

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643B82

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

Preview Lab → · Contrast checker → · Palette generator →