Online tool for creating color schemes. There are 6 choices of colors, the ability to adjust the brightness of the contrast of the selected colors or the choice of the available options (dark / light, etc.), the ability to view the hexadecimal codes of the main color and additional ones, there is a preview function of the “site” with the selected colors with light / dark background, simulation of various violations of people's perception of colors, randomizer, as well as an API for integration with your site. www.colorschemedesigner.com