Beside the website logo, there are site colors that can be set to best define the site identity. The visual aspect of the website is a key factor in making the users a great first impression and making them remember your online business/blog/store.
Go to the Customizer -> General Settings -> Site Colors.
Set the site colors according to your preferences.
Site colors go from Primary to Secondary, then to Color 3…Color 6 and the list might continue. The colors for each field defines elements from the largest ones to the smallest ones, in this order.
Background Color – you can also set the background color from here. In case you have previously set the background to transparent, or you have not chosen a background image, the background will have the color you define from this subsection.