#663F78 Color
#663F78 is rgb(102, 63, 120) in RGB and hsl(281, 31%, 36%) in HSL. The closest CSS named color is RebeccaPurple. White text is most readable on this background.
#663F78
HEX
#663F78RGB
rgb(102, 63, 120)HSL
hsl(281, 31%, 36%)HSV
hsv(281, 48%, 47%)OKLCH
oklch(43.8% 0.101 314.4)CMYK
cmyk(15%, 48%, 0%, 53%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #663F78 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text8.24:1AA normal ✓AA large ✓AAA normal ✓
TextBlack text2.55:1AA normal ✗AA large ✗AAA normal ✗
Color Harmonies
Colors that pair well with #663F78 based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #663F78, useful for hover states, backgrounds, and text variants.