#643E88#643E88

#643E88 is a dark, vivid violet. Relative luminance 0.079; OKLCH L 44.3% C 0.122 H 305.7°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#643E88
RGB	rgb(100, 62, 136)
HSL	hsl(271, 37%, 39%)
HSV	hsv(271, 54%, 53%)
CMYK	cmyk(26.5%, 54.4%, 0%, 46.7%)
CIE-LAB	lab(33.84, 31.90, -35.24)
CIE-LCH	lch(33.84, 47.54, 312.15°)
OKLab	oklab(44.3% 0.0712 -0.099)
OKLCH	oklch(44.3% 0.122 305.7)
XYZ	xyz(11.4212, 7.9322, 24.2172)
Luminance	0.0793 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E88 #62883E

analogous

#3F3E88 #643E88 #883E87

triadic

#643E88 #88643E #3E8864

tetradic

#643E88 #883F3E #62883E #3E8788

square

#643E88 #883F3E #62883E #3E8788

split-complementary

#643E88 #87883E #3E883F

monochromatic

#261834 #452B5E #643E88 #8353B0 #A17DC4

Accessibility & contrast

On white

8.12

#643E88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#643E88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E88

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E88	#FFFFFF	#000000	##FFFFFF
##643E88	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264E8B

Deuteranopia (green-blind)

#325086

Tritanopia (blue-blind)

#5E4B5D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #643e88;
/* rgb */ color: rgb(100, 62, 136);
/* oklch */ color: oklch(44.3% 0.122 305.7);

Tailwind

colors: {
  custom: {
    50: '#9274ab',
    500: '#643e88',
    950: '#000000',
  },
}

SCSS

$custom: #643e88;
$custom-light: #9274ab;
$custom-dark: #000000;

JSON

{
  "hex": "#643e88",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 136
  },
  "hsl": {
    "h": 270.811,
    "s": 37.374,
    "l": 38.824
  },
  "oklch": {
    "l": 0.443,
    "c": 0.122,
    "h": 305.7
  },
  "luminance": 0.07932
}

Semantic roles & 50–950 ramp

primary

#643E88

secondary

#90AE74

accent

#CD5A92

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643E88

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

Preview Lab → · Contrast checker → · Palette generator →