Using multiple shades is a great way to liven up a room's interior, visually adjust proportions, and intelligently zone the space. Rooms are truly transformed when you move away from a monochromatic palette. The influence of color on the perception of comfort is discussed in the article at https://moodfordecor.com/best-paint-colors-to-increase-home-value/ which provides specific examples of how a well-chosen color palette can make a home more luxurious and inviting to guests and buyers.