How to change top bar background and the remaining bottom background

Help & How To
#1

Hi,

I need to change the background of the entire home screen.

the one top bar marked as red needs to change and the one marked as in blue needs to change.can i get the correct css ?

Also tell me how to remove the current header 8th wonder should changed to custom header by css.

#2

Here are some good CSS resources…

#3

Have seen already but no use.