Entry and Button highlight

Hi All,

I've set my Entry to have a black background and white text. It works fine on Android, but on WinPhone it's only black when entry is not highlighted. Once I highlight it, the entry becomes white and text black and border red (as image below).

How can I change these colors to keep it with black background, white text and grey border?

About the button, I've set it to a dark blue. On Android, when I press the button it becomes only more darker (to give a feedback that it was pressed). On Winphone, it becomes red when I press the button.
Is there a way to change this pressed color?

Thanks