Front Page Settings
The themes like ColorMag and ColorNews has front page widgets areas which means the widgets placed in those areas are displayed in the frontpage of your WP site. And along with those widgets at the bottom of the frontpage, either a list of recent posts or a static page(set as homepage) is displayed.
However, an option is provided in the customizer whether or not to display the posts/page on the front page. The option can be found via the path mentioned below.
Appearnce->Customize-> Design Options -> Front Page Settings
Now you can see the option Check to hide blog posts/static page on front page which as the name suggests, hides the posts/page from the front page when checked.
Below is a gif image depicting the functionality of FrontPage Setting.