How to change the top and/or bottom bar color?

You may change the color on the header and footer area of your mobile chat.


.top-bar,
#top-bar-left,
#top-bar-right { background-color: #3D5B9B; }
#bottom,
#bottom button { background-color: #3D5B9B; }


To know how to edit the mobile CSS, refer to this link.