Change Chapter Bar Color

Hello,

I was wondering if it is possible to change the color of the Chapter Bar Title bar that appears in an ibook when you tap the screen when viewing it from an ipad (the bar which allows you to return to the Library, return to the Table of Contents, view MyNotes, Search, or Bookmark).

Right now the bar is in black (which I assume is the basic) but I would like it to be in white.

Any suggestions?

Thank you,

Santiago