Step 1: Navigate to the 'Studio' page on Mapbox web Page.
Step 2: Click on 'More options' and explore creating your own Background style.
Step 3: Once your new Background style is created, click on the 'Menu' button.
Step 4: Click on the 'Copy' icon to copy the link of this new Background Style.
Step 5: In the 'Data' folder, open the 'backgrounds.csv' file. Create a new row by keying in the name of the new background style, and paste the link from Step 4. Save and close the Notepad file. Your new background style is now available on ur-scape.