Background images for 2d games, one sprite vs tiles for simple one color

Hello everyone,

I am currently working on a 2d platformer game that uses lowpoly assests. My question is, is it better to use one sprite for a simple blue background, or should I use multiple sprites. Will using one sprite stop tearing, and also will it be easier for a phone to process compared to using multiple sprites. Currently I am using multiple sprites(tiles) to create my background. Any insight is highly appreciated as I am faily new to this. Thank you