Changing Color in Adelle Theme

Hi! How can I change the color of the bubbles on the header of the theme I'm using on my site?

http://getumovingfitness.com/

 

To change the color of the bubbles you need to edit the image background that is there and change colors into the image, here is the link to the image: http://getumovingfitness.com/wp-content/themes/Adelle/images/background.gif

 

How do I find that image on my site to be able to edit it?
Thanks for your help.

 

wp-content/themes/Adelle/images/background.gif

Code (markup):

 

Thank You! Thank You! Thank You! I actually ended up removing it.

 

I think you got answer, do let me know still you are looking for solution. I have expertise on wordpress.