A color scheme is a predefined set of colors that are coordinated to work well together. It can be used in various contexts such as web design, graphic design, interior design, and fashion. Sharing beautiful color schemes involves showcasing a combination of colors that are visually appealing and harmonious. This can be done by providing examples of successful color schemes, explaining the principles behind color harmony (like complementary colors, analogous colors, and monochromatic schemes), and offering advice on how to create and apply these schemes in different design projects.