There are many ways to create gradient wallpapers in photoshop. It is not necessary that to create gradient wallpaper you have to use gradient overlay tool in blending options.
Here I shall discuss the simplest way to create colourfull gradient wallpaper in photoshop in one minute.
Step 1: Open a new document. Size – as per your convenience.
Step5: Now go to the menu Filter -> Blur -> Gaussian Blur. There’s nothing specific in the amount of blur. Slide the slider till you are satisfied with the look.
I bet, this is the simplest way to create gradient wallpaper. The whole process takes five steps only, and that too when the pencil tool step is split into three !!!
Another reason of this being the simplest method is that the process is completely effortless. It doesn’t require careful drawing. Arbitrary shapes will also produce extremely beautiful images.
Also it provides wide flexibility. You can play with the color combination, level of blur etc.