#643B87#643B87

#643B87 is a dark, vivid violet. Relative luminance 0.076; OKLCH L 43.7% C 0.126 H 306.8°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#643B87
RGB	rgb(100, 59, 135)
HSL	hsl(272, 39%, 38%)
HSV	hsv(272, 56%, 53%)
CMYK	cmyk(25.9%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(33.11, 33.40, -35.80)
CIE-LCH	lch(33.11, 48.96, 313.02°)
OKLab	oklab(43.74% 0.0754 -0.1006)
OKLCH	oklch(43.74% 0.126 306.8)
XYZ	xyz(11.1918, 7.5866, 23.7917)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B87 #5E873B

analogous

#3E3B87 #643B87 #873B84

triadic

#643B87 #87643B #3B8764

tetradic

#643B87 #873E3B #5E873B #3B8487

square

#643B87 #873E3B #5E873B #3B8487

split-complementary

#643B87 #84873B #3B873E

monochromatic

#251632 #44285C #643B87 #844EB2 #A178C4

Accessibility & contrast

On white

8.34

#643B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#643B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B87

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B87	#FFFFFF	#000000	##FFFFFF
##643B87	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224C8A

Deuteranopia (green-blind)

#304E85

Tritanopia (blue-blind)

#5F495B

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643b87;
/* rgb */ color: rgb(100, 59, 135);
/* oklch */ color: oklch(43.7% 0.126 306.8);

Tailwind

colors: {
  custom: {
    50: '#9272aa',
    500: '#643b87',
    950: '#000000',
  },
}

SCSS

$custom: #643b87;
$custom-light: #9272aa;
$custom-dark: #000000;

JSON

{
  "hex": "#643b87",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 272.368,
    "s": 39.175,
    "l": 38.039
  },
  "oklch": {
    "l": 0.43738,
    "c": 0.12578,
    "h": 306.8
  },
  "luminance": 0.07587
}

Semantic roles & 50–950 ramp

primary

#643B87

secondary

#8CAE70

accent

#CF598F

background

#F9F7FA

surface

#F1EDF4

border

#CBC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #643B87

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

Preview Lab → · Contrast checker → · Palette generator →