title: windows phone 8 xaml set the color of a button on click
body: <p>I am working on win8 phone project
  whenever I click a button the buttons background changes to phones accent color or on a textBox the border color changes to phones accent color or the color of the keyboard buttons
  changes to phones accent color ...
  I tried to overwrite the PhoneAccentBrush in application.resources <code>&lt; solidColorBrush x:Key="PhoneAccentBrush" color="white" /&gt;</code> but it didnt work
  is there any way to change Phone Accent Color for all elements in my app ??</p>