There is a psychology to color. Color can invoke emotion and can define a brand. This resource is provided to aid in making a decision on the colors that you would like to use for your website (or any digital asset). The entire pallet does have to be used, you can reference any color in any palette as a directive for what you like. This system serves merely as a guide.
To get started, check any three emotions that you would like for you or your audience to experience, or select a category of palettes to display.