#643B7E#643B7E

#643B7E is a dark, moderate violet. Relative luminance 0.073; OKLCH L 43.2% C 0.115 H 310.7°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#643B7E
RGB	rgb(100, 59, 126)
HSL	hsl(277, 36%, 36%)
HSV	hsv(277, 53%, 49%)
CMYK	cmyk(20.6%, 53.2%, 0%, 50.6%)
CIE-LAB	lab(32.58, 31.17, -31.05)
CIE-LCH	lch(32.58, 44.00, 315.11°)
OKLab	oklab(43.18% 0.0747 -0.0868)
OKLCH	oklch(43.18% 0.115 310.7)
XYZ	xyz(10.5847, 7.3438, 20.5945)
Luminance	0.0734 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B7E #557E3B

analogous

#433B7E #643B7E #7E3B77

triadic

#643B7E #7E643B #3B7E64

tetradic

#643B7E #7E433B #557E3B #3B777E

square

#643B7E #7E433B #557E3B #3B777E

split-complementary

#643B7E #777E3B #3B7E43

monochromatic

#22142B #432754 #643B7E #854FA8 #A275BE

Accessibility & contrast

On white

8.51

#643B7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#643B7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B7E

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B7E	#FFFFFF	#000000	##FFFFFF
##643B7E	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4B80

Deuteranopia (green-blind)

#364D7C

Tritanopia (blue-blind)

#614657

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #643b7e;
/* rgb */ color: rgb(100, 59, 126);
/* oklch */ color: oklch(43.2% 0.115 310.7);

Tailwind

colors: {
  custom: {
    50: '#9272a4',
    500: '#643b7e',
    950: '#000000',
  },
}

SCSS

$custom: #643b7e;
$custom-light: #9272a4;
$custom-dark: #000000;

JSON

{
  "hex": "#643b7e",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 126
  },
  "hsl": {
    "h": 276.716,
    "s": 36.216,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43176,
    "c": 0.11453,
    "h": 310.7
  },
  "luminance": 0.07344
}

Semantic roles & 50–950 ramp

primary

#643B7E

secondary

#84A86D

accent

#CC5C87

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #643B7E

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

Preview Lab → · Contrast checker → · Palette generator →