#663F78#663F78

#663F78 is a dark, moderate purple. Relative luminance 0.077; OKLCH L 43.8% C 0.101 H 314.4°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#663F78
RGB	rgb(102, 63, 120)
HSL	hsl(281, 31%, 36%)
HSV	hsv(281, 48%, 47%)
CMYK	cmyk(15%, 47.5%, 0%, 52.9%)
CIE-LAB	lab(33.43, 27.98, -25.95)
CIE-LCH	lch(33.43, 38.16, 317.15°)
OKLab	oklab(43.76% 0.0704 -0.072)
OKLCH	oklch(43.76% 0.101 314.4)
XYZ	xyz(10.6466, 7.7361, 18.6980)
Luminance	0.0774 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663F78 #51783F

analogous

#493F78 #663F78 #783F6D

triadic

#663F78 #78663F #3F7866

tetradic

#663F78 #78493F #51783F #3F6D78

square

#663F78 #78493F #51783F #3F6D78

split-complementary

#663F78 #6D783F #3F7849

monochromatic

#221528 #442A50 #663F78 #8854A0 #A479B9

Accessibility & contrast

On white

8.24

#663F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#663F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663F78

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663F78	#FFFFFF	#000000	##FFFFFF
##663F78	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#344C7A

Deuteranopia (green-blind)

#3E5076

Tritanopia (blue-blind)

#654756

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #663f78;
/* rgb */ color: rgb(102, 63, 120);
/* oklch */ color: oklch(43.8% 0.101 314.4);

Tailwind

colors: {
  custom: {
    50: '#93759f',
    500: '#663f78',
    950: '#000000',
  },
}

SCSS

$custom: #663f78;
$custom-light: #93759f;
$custom-dark: #000000;

JSON

{
  "hex": "#663f78",
  "rgb": {
    "r": 102,
    "g": 63,
    "b": 120
  },
  "hsl": {
    "h": 281.053,
    "s": 31.148,
    "l": 35.882
  },
  "oklch": {
    "l": 0.43757,
    "c": 0.10068,
    "h": 314.4
  },
  "luminance": 0.07736
}

Semantic roles & 50–950 ramp

primary

#663F78

secondary

#80A370

accent

#C76081

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #663F78

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

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