reza

This light background is better.

Oh dear Esmi,
I had forgotten. This problem is solved.

Mr. Mohsen Ghiasi this method showed that:

border-left:240px solid transparent;
Instead of:
border-left:240px solid #e6ece9;

Thank you, and he.

Yes
I want the background image to come in sidebar.

Thank you esmi

Thank you Esmi,

Please see to:
https://ghiasabadi.com

How add a image to sidebar?

Tank you

But not right. I think the settings except sidebar is connected.

Tank you dear wpbum
But still not right. CSS file is very strange.

I think this is problem related to:

#wrapper{
  float:left;
  width:100%;
  border-left:240px solid #e6ece9; /* Sidebar left background color */
  border-right:240px solid #e6ece9; /* Siderab right background color */
  margin-left:-240px;
  margin-right:-240px;
  background:#e6ece9 url('images/bg.jpg') repeat;
  display:inline;
}

I am using the F2 theme. I would like to send the image background for sidebar. But could not. Image sidebar is incomplete.
https://ghiasabadi.co.cc
Thank you.