Control alpha colors in Android

ref

Hex Opacity Values

    100% — FF
    95% — F2
    90% — E6
    85% — D9
    80% — CC
    75% — BF
    70% — B3
    65% — A6
    60% — 99
    55% — 8C
    50% — 80
    45% — 73
    40% — 66
    35% — 59
    30% — 4D
    25% — 40
    20% — 33
    15% — 26
    10% — 1A
    5% — 0D
    0% — 00

http://stackoverflow.com/questions/5445085/understanding-colors-in-android-6-characters