#663E8A#663E8A

#663E8A is a dark, vivid violet. Relative luminance 0.081; OKLCH L 44.7% C 0.125 H 306.3°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#663E8A
RGB	rgb(102, 62, 138)
HSL	hsl(272, 38%, 39%)
HSV	hsv(272, 55%, 54%)
CMYK	cmyk(26.1%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(34.20, 32.97, -35.89)
CIE-LCH	lch(34.20, 48.73, 312.57°)
OKLab	oklab(44.66% 0.0741 -0.1009)
OKLCH	oklch(44.66% 0.125 306.3)
XYZ	xyz(11.7886, 8.1051, 24.9832)
Luminance	0.0810 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663E8A #628A3E

analogous

#403E8A #663E8A #8A3E88

triadic

#663E8A #8A663E #3E8A66

tetradic

#663E8A #8A403E #628A3E #3E888A

square

#663E8A #8A403E #628A3E #3E888A

split-complementary

#663E8A #888A3E #3E8A40

monochromatic

#281836 #472B60 #663E8A #8553B2 #A37EC5

Accessibility & contrast

On white

8.01

#663E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#663E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663E8A

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663E8A	#FFFFFF	#000000	##FFFFFF
##663E8A	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254F8D

Deuteranopia (green-blind)

#325188

Tritanopia (blue-blind)

#604C5E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #663e8a;
/* rgb */ color: rgb(102, 62, 138);
/* oklch */ color: oklch(44.7% 0.125 306.3);

Tailwind

colors: {
  custom: {
    50: '#9475ac',
    500: '#663e8a',
    950: '#000000',
  },
}

SCSS

$custom: #663e8a;
$custom-light: #9475ac;
$custom-dark: #000000;

JSON

{
  "hex": "#663e8a",
  "rgb": {
    "r": 102,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 271.579,
    "s": 38,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44658,
    "c": 0.12515,
    "h": 306.3
  },
  "luminance": 0.08105
}

Semantic roles & 50–950 ramp

primary

#663E8A

secondary

#90AF75

accent

#CE5A91

background

#F9F7FA

surface

#F2EDF4

border

#CCC8CE

text

#0D0810

muted

#7E7B7F

Preview Lab

Preview with #663E8A

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

Preview Lab → · Contrast checker → · Palette generator →