#643D90#643D90

#643D90 is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.7% C 0.134 H 303.1°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#643D90
RGB	rgb(100, 61, 144)
HSL	hsl(268, 40%, 40%)
HSV	hsv(268, 58%, 56%)
CMYK	cmyk(30.6%, 57.6%, 0%, 43.5%)
CIE-LAB	lab(34.11, 34.55, -39.73)
CIE-LCH	lch(34.11, 52.65, 311.01°)
OKLab	oklab(44.66% 0.073 -0.1122)
OKLCH	oklch(44.66% 0.134 303.1)
XYZ	xyz(11.9572, 8.0604, 27.3060)
Luminance	0.0806 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D90 #69903D

analogous

#3D3F90 #643D90 #8E3D90

triadic

#643D90 #90643D #3D9064

tetradic

#643D90 #903D3F #69903D #3D908E

square

#643D90 #903D3F #69903D #3D908E

split-complementary

#643D90 #908E3D #3F903D

monochromatic

#28193A #462B65 #643D90 #8254B6 #A17FC9

Accessibility & contrast

On white

8.04

#643D90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#643D90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D90

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D90	#FFFFFF	#000000	##FFFFFF
##643D90	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4F93

Deuteranopia (green-blind)

#2A508E

Tritanopia (blue-blind)

#5C4D60

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643d90;
/* rgb */ color: rgb(100, 61, 144);
/* oklch */ color: oklch(44.7% 0.134 303.1);

Tailwind

colors: {
  custom: {
    50: '#9374b1',
    500: '#643d90',
    950: '#000000',
  },
}

SCSS

$custom: #643d90;
$custom-light: #9374b1;
$custom-dark: #000000;

JSON

{
  "hex": "#643d90",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 144
  },
  "hsl": {
    "h": 268.193,
    "s": 40.488,
    "l": 40.196
  },
  "oklch": {
    "l": 0.44655,
    "c": 0.13385,
    "h": 303.1
  },
  "luminance": 0.0806
}

Semantic roles & 50–950 ramp

primary

#643D90

secondary

#96B376

accent

#D05798

background

#F9F7FA

surface

#F2EDF5

border

#CCC8CF

text

#0D0811

muted

#7E7B80

Preview Lab

Preview with #643D90

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

Preview Lab → · Contrast checker → · Palette generator →