The 500px colors are Blue Cola, Tart Orange, American Green, we recommend using the 500px color palette for personal projects and in the case of commercial use to visit the company website. The color codes: RGB, CYMK for print, and Hex for web HTML/CSS. 500px Official Website
Download the 500px color scheme palette image with the color hex codes as a single image. These are the suggested colors to be used for digital media.