#663B83#663B83

#663B83 is a dark, vivid violet. Relative luminance 0.076; OKLCH L 43.7% C 0.121 H 309.9°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#663B83
RGB	rgb(102, 59, 131)
HSL	hsl(276, 38%, 37%)
HSV	hsv(276, 55%, 51%)
CMYK	cmyk(22.1%, 55%, 0%, 48.6%)
CIE-LAB	lab(33.12, 32.97, -33.29)
CIE-LCH	lch(33.12, 46.85, 314.73°)
OKLab	oklab(43.72% 0.0779 -0.0933)
OKLCH	oklch(43.72% 0.122 309.9)
XYZ	xyz(11.1394, 7.5916, 22.3468)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B83 #58833B

analogous

#423B83 #663B83 #833B7C

triadic

#663B83 #83663B #3B8366

tetradic

#663B83 #83423B #58833B #3B7C83

square

#663B83 #83423B #58833B #3B7C83

split-complementary

#663B83 #7C833B #3B8342

monochromatic

#24152F #452859 #663B83 #874EAD #A377C2

Accessibility & contrast

On white

8.34

#663B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#663B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B83

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B83	#FFFFFF	#000000	##FFFFFF
##663B83	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)

#264C85

Deuteranopia (green-blind)

#344F81

Tritanopia (blue-blind)

#624759

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #663b83;
/* rgb */ color: rgb(102, 59, 131);
/* oklch */ color: oklch(43.7% 0.121 309.9);

Tailwind

colors: {
  custom: {
    50: '#9473a7',
    500: '#663b83',
    950: '#000000',
  },
}

SCSS

$custom: #663b83;
$custom-light: #9473a7;
$custom-dark: #000000;

JSON

{
  "hex": "#663b83",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 131
  },
  "hsl": {
    "h": 275.833,
    "s": 37.895,
    "l": 37.255
  },
  "oklch": {
    "l": 0.43724,
    "c": 0.1215,
    "h": 309.9
  },
  "luminance": 0.07591
}

Semantic roles & 50–950 ramp

primary

#663B83

secondary

#87AB6F

accent

#CE5A89

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D080F

muted

#7E7B7F

Preview Lab

Preview with #663B83

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

Preview Lab → · Contrast checker → · Palette generator →