FilterEditor Textbox Selection Background (metro theme)

[Olya]

I need to change the black Selection Background of a textbox which is a default built-in editor for the string type of data.
I'm using a metro theme but unfortunately it doesn't affect the selection background color of the components. So I have to change it for every control, just in this case I don't know how to style this textbox.

I attached a picture to show what I mean.