rgba(255, 0, 0, 1.0)

rgba(255, 0, 0, 0.8)

rgba(255, 0, 0, 0.6)

rgba(255, 0, 0, 0.4)

rgba(255, 0, 0, 0.2)

opacity:1.0

opacity:0.8

opacity:0.6

opacity:0.4

opacity:0.2