iphone 5C wallpaper

Just bought an iphone 5C today, in yellow. When it imported all my stuff to the new phone from icloud, it also took out the yellow factory background (wallpaper) that was there. It replaced it with a custom wallpaper I had on my previous iphone. My question is:

How do replace the wallpaper it imported from icloud, with the original yellow wallpaper that was there from the factory? There is no solid yellow wallpaper in the apple wallpaers built in under Wallpaper and Brightness in the Settings. Thanks.