#663D7B#663D7B

#663D7B is a dark, moderate violet. Relative luminance 0.076; OKLCH L 43.6% C 0.108 H 313.2°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#663D7B
RGB	rgb(102, 61, 123)
HSL	hsl(280, 34%, 36%)
HSV	hsv(280, 50%, 48%)
CMYK	cmyk(17.1%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(33.12, 29.88, -28.31)
CIE-LCH	lch(33.12, 41.16, 316.55°)
OKLab	oklab(43.58% 0.074 -0.0788)
OKLCH	oklch(43.58% 0.108 313.2)
XYZ	xyz(10.7228, 7.5926, 19.6357)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663D7B #527B3D

analogous

#473D7B #663D7B #7B3D71

triadic

#663D7B #7B663D #3D7B66

tetradic

#663D7B #7B473D #527B3D #3D717B

square

#663D7B #7B473D #527B3D #3D717B

split-complementary

#663D7B #717B3D #3D7B47

monochromatic

#221429 #442952 #663D7B #8851A4 #A477BC

Accessibility & contrast

On white

8.34

#663D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#663D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663D7B

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663D7B	#FFFFFF	#000000	##FFFFFF
##663D7B	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)

#2F4C7D

Deuteranopia (green-blind)

#3B4F79

Tritanopia (blue-blind)

#644756

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #663d7b;
/* rgb */ color: rgb(102, 61, 123);
/* oklch */ color: oklch(43.6% 0.108 313.2);

Tailwind

colors: {
  custom: {
    50: '#9374a1',
    500: '#663d7b',
    950: '#000000',
  },
}

SCSS

$custom: #663d7b;
$custom-light: #9374a1;
$custom-dark: #000000;

JSON

{
  "hex": "#663d7b",
  "rgb": {
    "r": 102,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 279.677,
    "s": 33.696,
    "l": 36.078
  },
  "oklch": {
    "l": 0.4358,
    "c": 0.10809,
    "h": 313.2
  },
  "luminance": 0.07592
}

Semantic roles & 50–950 ramp

primary

#663D7B

secondary

#81A66E

accent

#CA5E83

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080F

muted

#7E7B7E

Preview Lab

Preview with #663D7B

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

Preview Lab → · Contrast checker → · Palette generator →