The following div is set to a 50% opacity.
This paragraph has no additional opacity settings.
This paragraph has been set to be 100% opaque.
This paragraph has been set to be 50% opaque.
This paragraph has been set to be 200% opaque.
My experience with CSS inheritance would lead me to believe that the first and the third paragraph should look similar, with the middle [2nd] paragraph being fully opaque (and thus similar to the text of this sentence).