#643D8E#643D8E

#643D8E is a dark, vivid violet. Relative luminance 0.080; OKLCH L 44.5% C 0.131 H 303.8°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#643D8E
RGB	rgb(100, 61, 142)
HSL	hsl(269, 40%, 40%)
HSV	hsv(269, 57%, 56%)
CMYK	cmyk(29.6%, 57%, 0%, 44.3%)
CIE-LAB	lab(33.98, 34.03, -38.71)
CIE-LCH	lch(33.98, 51.54, 311.32°)
OKLab	oklab(44.52% 0.073 -0.1092)
OKLCH	oklch(44.52% 0.131 303.8)
XYZ	xyz(11.8057, 7.9998, 26.5081)
Luminance	0.0800 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D8E #678E3D

analogous

#3D3F8E #643D8E #8C3D8E

triadic

#643D8E #8E643D #3D8E64

tetradic

#643D8E #8E3D3F #678E3D #3D8E8C

square

#643D8E #8E3D3F #678E3D #3D8E8C

split-complementary

#643D8E #8E8C3D #3F8E3D

monochromatic

#281838 #462B63 #643D8E #8253B5 #A17EC8

Accessibility & contrast

On white

8.08

#643D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#643D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D8E

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D8E	#FFFFFF	#000000	##FFFFFF
##643D8E	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4F91

Deuteranopia (green-blind)

#2C508C

Tritanopia (blue-blind)

#5C4D5F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643d8e;
/* rgb */ color: rgb(100, 61, 142);
/* oklch */ color: oklch(44.5% 0.131 303.8);

Tailwind

colors: {
  custom: {
    50: '#9374af',
    500: '#643d8e',
    950: '#000000',
  },
}

SCSS

$custom: #643d8e;
$custom-light: #9374af;
$custom-dark: #000000;

JSON

{
  "hex": "#643d8e",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 142
  },
  "hsl": {
    "h": 268.889,
    "s": 39.901,
    "l": 39.804
  },
  "oklch": {
    "l": 0.44522,
    "c": 0.13131,
    "h": 303.8
  },
  "luminance": 0.08
}

Semantic roles & 50–950 ramp

primary

#643D8E

secondary

#95B175

accent

#D05896

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643D8E

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

Preview Lab → · Contrast checker → · Palette generator →