Retro Gradient Backgrounds set ideal for websites, digital services, product designs, social media templates and new brands. We also used these backgrounds to give the photos a retro effect. You can simply set our gradient layer on top of your photo in Photoshop and apply one of the blending modes to the gradient layer. We recommend using Screen mode and 50-70% transparency. You can also add some noise.

https://www.deviantart.com/graphicassets/art/Free-Retro-Gradient-Backgrounds-936440861