I think I have a simple problem, but instead of playing guess and test forever, I thought I would ask here. I have a button in my header that I have open the aside. Can't figure out how to get the button background off:

See how the reminants of the button are still there? Also, if I wanted to use the alternate color scheme icon, how would I do that? Here is the relevant header code, but if you need to see more I will certainly post the whole thing. 

2. <header  data-role="header" data-position="fixed" >
3. <a href="#sideMenu" data-role="button" data-icon="bullets" style="padding:1em"></a>
4. <h2>
5. Map
6. </h2>
7. </header>

I appreciate any help! I am a super n00b.