The background should be lively, dynamic, and youthful, conveying energy and fun, using Pepsi’s main colors: blue, red, and white. It could be a gradient fading from blue to red, with areas of light white to add brightness. To reflect the fizzy nature of the drink, small transparent bubbles can be scattered throughout the background. Wavy lines or energy waves can flow across the background to give a sense of movement without being distracting. Overall, the look should be bright, cheerful, and fresh, ready to have text, images, and the logo placed on top. See more