> Please login to your Joomla admin dashboard
> Please go to the Extensions > click Template Manager from the top menu
> Please find the Protostar template from the list of templates, and click on My Default Style (Protostar)( we choose this in our settings )
> Please click on the option tab
> Please find Background Colour setting, please select the colour by clicking on the right box
> Please click on the Save button to save the settings
With Background Colour: #F4F6F7
With Background Colour: #8cb7e6