#663F79#663F79

#663F79 is a dark, moderate purple. Relative luminance 0.078; OKLCH L 43.8% C 0.102 H 313.8°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#663F79
RGB	rgb(102, 63, 121)
HSL	hsl(280, 32%, 36%)
HSV	hsv(280, 48%, 47%)
CMYK	cmyk(15.7%, 47.9%, 0%, 52.5%)
CIE-LAB	lab(33.48, 28.21, -26.49)
CIE-LCH	lch(33.48, 38.70, 316.80°)
OKLab	oklab(43.81% 0.0706 -0.0735)
OKLCH	oklch(43.81% 0.102 313.8)
XYZ	xyz(10.7076, 7.7605, 19.0193)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663F79 #52793F

analogous

#493F79 #663F79 #793F6F

triadic

#663F79 #79663F #3F7966

tetradic

#663F79 #79493F #52793F #3F6F79

square

#663F79 #79493F #52793F #3F6F79

split-complementary

#663F79 #6F793F #3F7949

monochromatic

#221529 #442A51 #663F79 #8854A1 #A479B9

Accessibility & contrast

On white

8.23

#663F79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#663F79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663F79

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663F79	#FFFFFF	#000000	##FFFFFF
##663F79	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334D7B

Deuteranopia (green-blind)

#3E5077

Tritanopia (blue-blind)

#654856

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #663f79;
/* rgb */ color: rgb(102, 63, 121);
/* oklch */ color: oklch(43.8% 0.102 313.8);

Tailwind

colors: {
  custom: {
    50: '#9375a0',
    500: '#663f79',
    950: '#000000',
  },
}

SCSS

$custom: #663f79;
$custom-light: #9375a0;
$custom-dark: #000000;

JSON

{
  "hex": "#663f79",
  "rgb": {
    "r": 102,
    "g": 63,
    "b": 121
  },
  "hsl": {
    "h": 280.345,
    "s": 31.522,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43813,
    "c": 0.10194,
    "h": 313.8
  },
  "luminance": 0.0776
}

Semantic roles & 50–950 ramp

primary

#663F79

secondary

#81A470

accent

#C86082

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #663F79

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

Preview Lab → · Contrast checker → · Palette generator →