How can I change the ugly pumpkin colored actionbar in messages?

[AC Question]

I just updated to lollipop and now my actionbar for messages is an ugly pumpkin color. I am extremely new to the Android market and cannot figure out how to change that color! Any help/advice is appreciated.

 

[Mst99]

Can't be changed, only the background and message bubbles. The Playstore has plenty of free messaging apps that offer tons of customizations, Textra is one for example.