#643F7B#643F7B

#643F7B is a dark, moderate violet. Relative luminance 0.077; OKLCH L 43.7% C 0.104 H 311.2°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#643F7B
RGB	rgb(100, 63, 123)
HSL	hsl(277, 32%, 36%)
HSV	hsv(277, 49%, 48%)
CMYK	cmyk(18.7%, 48.8%, 0%, 51.8%)
CIE-LAB	lab(33.34, 28.06, -27.98)
CIE-LCH	lch(33.34, 39.63, 315.09°)
OKLab	oklab(43.69% 0.0682 -0.0779)
OKLCH	oklch(43.69% 0.104 311.2)
XYZ	xyz(10.6075, 7.6946, 19.6615)
Luminance	0.0769 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F7B #567B3F

analogous

#463F7B #643F7B #7B3F74

triadic

#643F7B #7B643F #3F7B64

tetradic

#643F7B #7B463F #567B3F #3F747B

square

#643F7B #7B463F #567B3F #3F747B

split-complementary

#643F7B #747B3F #3F7B46

monochromatic

#22162A #432A53 #643F7B #8554A3 #A27ABB

Accessibility & contrast

On white

8.27

#643F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#643F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F7B

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F7B	#FFFFFF	#000000	##FFFFFF
##643F7B	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#314D7D

Deuteranopia (green-blind)

#3B4F79

Tritanopia (blue-blind)

#614857

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f7b;
/* rgb */ color: rgb(100, 63, 123);
/* oklch */ color: oklch(43.7% 0.104 311.2);

Tailwind

colors: {
  custom: {
    50: '#9175a1',
    500: '#643f7b',
    950: '#000000',
  },
}

SCSS

$custom: #643f7b;
$custom-light: #9175a1;
$custom-dark: #000000;

JSON

{
  "hex": "#643f7b",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 123
  },
  "hsl": {
    "h": 277,
    "s": 32.258,
    "l": 36.471
  },
  "oklch": {
    "l": 0.43688,
    "c": 0.10356,
    "h": 311.2
  },
  "luminance": 0.07694
}

Semantic roles & 50–950 ramp

primary

#643F7B

secondary

#85A571

accent

#C85F88

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #643F7B

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

Preview Lab → · Contrast checker → · Palette generator →