#643A88#643A88

#643A88 is a dark, vivid violet. Relative luminance 0.075; OKLCH L 43.6% C 0.129 H 306.7°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#643A88
RGB	rgb(100, 58, 136)
HSL	hsl(272, 40%, 38%)
HSV	hsv(272, 57%, 53%)
CMYK	cmyk(26.5%, 57.4%, 0%, 46.7%)
CIE-LAB	lab(32.95, 34.23, -36.67)
CIE-LCH	lch(32.95, 50.16, 313.03°)
OKLab	oklab(43.64% 0.0769 -0.1032)
OKLCH	oklch(43.64% 0.129 306.7)
XYZ	xyz(11.2116, 7.5131, 24.1473)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A88 #5E883A

analogous

#3D3A88 #643A88 #883A85

triadic

#643A88 #88643A #3A8864

tetradic

#643A88 #883D3A #5E883A #3A8588

square

#643A88 #883D3A #5E883A #3A8588

split-complementary

#643A88 #85883A #3A883D

monochromatic

#251532 #44285D #643A88 #844CB3 #A177C5

Accessibility & contrast

On white

8.39

#643A88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#643A88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A88

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A88	#FFFFFF	#000000	##FFFFFF
##643A88	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4C8B

Deuteranopia (green-blind)

#2E4E86

Tritanopia (blue-blind)

#5E495B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643a88;
/* rgb */ color: rgb(100, 58, 136);
/* oklch */ color: oklch(43.6% 0.129 306.7);

Tailwind

colors: {
  custom: {
    50: '#9372ab',
    500: '#643a88',
    950: '#000000',
  },
}

SCSS

$custom: #643a88;
$custom-light: #9372ab;
$custom-dark: #000000;

JSON

{
  "hex": "#643a88",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 136
  },
  "hsl": {
    "h": 272.308,
    "s": 40.206,
    "l": 38.039
  },
  "oklch": {
    "l": 0.43641,
    "c": 0.12869,
    "h": 306.7
  },
  "luminance": 0.07513
}

Semantic roles & 50–950 ramp

primary

#643A88

secondary

#8CAE6F

accent

#D0588F

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643A88

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

Preview Lab → · Contrast checker → · Palette generator →