class Alpha Alpha (opacity) constants. The main role of these constants is to improve code readability, using names that immediately suggest the effect that the chosen opacity value has. Fields Summary OPAQUE PERCENT_0 PERCENT_10 PERCENT_100 PERCENT_20 PERCENT_30 PERCENT_40 PERCENT_50 PERCENT_60 PERCENT_70 PERCENT_80 PERCENT_90 UNSEEN Constants Name Value Description