#643B74#643B74

#643B74 is a dark, moderate purple. Relative luminance 0.071; OKLCH L 42.6% C 0.102 H 315.9°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#643B74
RGB	rgb(100, 59, 116)
HSL	hsl(283, 33%, 34%)
HSV	hsv(283, 49%, 45%)
CMYK	cmyk(13.8%, 49.1%, 0%, 54.5%)
CIE-LAB	lab(32.03, 28.79, -25.65)
CIE-LCH	lch(32.03, 38.56, 318.30°)
OKLab	oklab(42.59% 0.0734 -0.0711)
OKLCH	oklch(42.59% 0.102 315.9)
XYZ	xyz(9.9714, 7.0985, 17.3645)
Luminance	0.0710 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B74 #4B743B

analogous

#483B74 #643B74 #743B68

triadic

#643B74 #74643B #3B7464

tetradic

#643B74 #74483B #4B743B #3B6874

square

#643B74 #74483B #4B743B #3B6874

split-complementary

#643B74 #68743B #3B7448

monochromatic

#1E1223 #41264B #643B74 #87509D #A472B7

Accessibility & contrast

On white

8.68

#643B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#643B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B74

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B74	#FFFFFF	#000000	##FFFFFF
##643B74	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304976

Deuteranopia (green-blind)

#3C4D72

Tritanopia (blue-blind)

#634352

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #643b74;
/* rgb */ color: rgb(100, 59, 116);
/* oklch */ color: oklch(42.6% 0.102 315.9);

Tailwind

colors: {
  custom: {
    50: '#91729c',
    500: '#643b74',
    950: '#000000',
  },
}

SCSS

$custom: #643b74;
$custom-light: #91729c;
$custom-dark: #000000;

JSON

{
  "hex": "#643b74",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 116
  },
  "hsl": {
    "h": 283.158,
    "s": 32.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.42591,
    "c": 0.10218,
    "h": 315.9
  },
  "luminance": 0.07098
}

Semantic roles & 50–950 ramp

primary

#643B74

secondary

#79A16A

accent

#C95F7D

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643B74

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

Preview Lab → · Contrast checker → · Palette generator →