title: Emacs color theme setting
body: <p>i'm now configure my own emacs color theme , base on the color-theme plugin.</p>
  
  <p>i just can't find how to define the status bar's color (where the current line number ,file name ,mode is shown ) .such as if you use color-theme-jb-simple , the status bar's color is likely blue4 ,but i can't find where it is defined .anyone knows ?</p>
  
  <p>thanks all.</p>