#643D74#643D74

#643D74 is a dark, moderate purple. Relative luminance 0.073; OKLCH L 42.9% C 0.098 H 315.5°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#643D74
RGB	rgb(100, 61, 116)
HSL	hsl(283, 31%, 35%)
HSV	hsv(283, 47%, 45%)
CMYK	cmyk(13.8%, 47.4%, 0%, 54.5%)
CIE-LAB	lab(32.50, 27.60, -24.91)
CIE-LCH	lch(32.50, 37.18, 317.93°)
OKLab	oklab(42.94% 0.0702 -0.069)
OKLCH	oklch(42.94% 0.098 315.5)
XYZ	xyz(10.0762, 7.3080, 17.3994)
Luminance	0.0731 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D74 #4D743D

analogous

#493D74 #643D74 #743D69

triadic

#643D74 #74643D #3D7464

tetradic

#643D74 #74493D #4D743D #3D6974

square

#643D74 #74493D #4D743D #3D6974

split-complementary

#643D74 #69743D #3D7449

monochromatic

#1F1324 #41284C #643D74 #87529C #A375B6

Accessibility & contrast

On white

8.53

#643D74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#643D74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D74

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D74	#FFFFFF	#000000	##FFFFFF
##643D74	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334A76

Deuteranopia (green-blind)

#3D4E72

Tritanopia (blue-blind)

#634553

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #643d74;
/* rgb */ color: rgb(100, 61, 116);
/* oklch */ color: oklch(42.9% 0.098 315.5);

Tailwind

colors: {
  custom: {
    50: '#91739c',
    500: '#643d74',
    950: '#000000',
  },
}

SCSS

$custom: #643d74;
$custom-light: #91739c;
$custom-dark: #000000;

JSON

{
  "hex": "#643d74",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 116
  },
  "hsl": {
    "h": 282.545,
    "s": 31.073,
    "l": 34.706
  },
  "oklch": {
    "l": 0.4294,
    "c": 0.09845,
    "h": 315.5
  },
  "luminance": 0.07308
}

Semantic roles & 50–950 ramp

primary

#643D74

secondary

#7BA16C

accent

#C7617E

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643D74

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

Preview Lab → · Contrast checker → · Palette generator →