There is no set rule for the number of color schemes to use on a single website, as it ultimately depends on the overall design and aesthetic goals of the website. However, it is generally recommended to limit the number of color schemes to three or four in order to maintain a cohesive and visually pleasing design. Using too many different color schemes can create a disjointed and cluttered look. It is important to choose colors that complement each other and create a harmonious overall design.
