Cascading style sheets (CSS) are used to decorate websites and online pages. With the aid of the color picker tool, we can simply select a range of colors from low to high. Using a visual interface, this program allows you to choose a code and has it create a color code according to that code. Create new colors and convert them to other formats with this application. Compare colors by laying them one on top of the other. Color Picker for HTML CSS HEX RGB and HSL. To view the colors, click on the picture of the color palette below. It's as simple as dragging and dropping colors to compare them!