sprockets/src/main/java/net/sf/sprockets/text/style/MutableForegroundColorSpan.java
@Override
    public int getForegroundColor() {
        return Color.argb(mAlpha, Color.red(mColor), Color.green(mColor), Color.blue(mColor));
    }
@Override
    public int getForegroundColor() {
        return Color.argb(mAlpha, Color.red(mColor), Color.green(mColor), Color.blue(mColor));
    }
Get the result of applying the alpha to the color.