Theme Gets Disturbed When the Widget is Added

Hi,

I am using the following theme with my wordpress blog.
https://www.freshthemes.com/demo/freshlife/

You can see it has white background behind the posts and sidebars. When i add widgets to it the white background goes off and the blue background appears which cuts the page in many slices which looks very unprofessional. you can see the example below:
https://www.mackverma.com

please let me know what can be in order to fix this problem.

Thanks.