If you want to set a custom screen color of a Page, follow the steps given below
● Log in to your account
● Select the ‘Products’ option from the main menu
● Click on the "✎" Edit option of the Page whose screen color you want to change
● Scroll down to ‘Product Style’ section
● Select Screen color of your choice from the Color Picker Box
● Or, enter the HEX code of the color
● Click on submit.
● Click on ok to continue.