6: Color, surface, and iconography emphasize actions User action is the essence of experience design. The primary actions are inflection points that transform the whole design. Their emphasis makes core functionality immediately apparent and provides waypoints for the user.
If you're designing, or overseeing the design of, your consignment or resale shop, you're probably pretty picky about the colors you ant. This site, says TGtbT.com, lets you choose them visually and copies the color code for you to save and/or send to your developer. Also very handy when you're designing graphics for your blog and social media of course!