Hey Omkar,

Greetings from the Freshworks community!
 

We understand that you would like to add a background image to the search bar. This is possible via the portal customization feature available from Pro plan. Kindly navigate to Admin → Portals → Customize portal. 
 

Sample CSS code:

body {

  background-color: #EFEFEE;

  background-image: url("https://iili.io/OMV4XR.jpg");

}

Here’s a solution article for your reference - https://support.freshdesk.com/en/support/solutions/folders/117138
 

Also, we highly recommend you use an image that is publicly hosted. Local images are specific to the system, and hence we do not suggest using the same.

Cheers,

Aishvarya