In this tutorial, you’ll go through easy steps for creating a nice abstract rainbow background in Photoshop. We’ll use Photoshop’s simple shapes, layer styles and gradients to create a colorful background. Let’s get started! Final Image Preview Create a new document (Ctrl+N) in Adobe Photoshop with the size 1920px by 1200px (RGB color mode) at a resolution of 72 pixels/inch. Select then the Paint