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Backgrounds
Common units of measurement
→
color
border-color
background-color
color
color-keywords
w3.org/TR/2011/REC-css3-color-20110607/#svg-color
hex
#rrggbb
#rgb
rgb
rgb(000-255,000-255,000-255)
rgb(0-100%,0-100%,0-100%)
rgba
rgba(000-255,000-255,000-255,0-1)
rgba(0-100%,0-100%,0-100%,0-1)
hsl
Hue, Saturation, Lightness
hsla
opacité
opacity : 0-1