Hello Roger,
Thank you so much for using our theme. From the options you can only change the background of the image section. If you want to make the whole section color white, please add the below CSS code,
body.home {
background: #ffffff;
}Go to Appearance > Customize > Layout/Design Options > Custom CSS and paste the above code there. Hope this will solve your problem.
Warm Regards,
Acme Supports