Aside from primary colors (the definition varies, but traditionally includes red, yellow and blue), there are also shades, nuances and tones. Tones range from warm to cold, with the first image below corresponding to the former, while the rest to the latter. Also, some psychologists believe that colors in a room may influence moods of the persons present, while light has also been regarded as a potential factor in exterior mood regulation.
Real Estate Sketches (Rough Drawings)
Many Websites, books and academic articles discuss finance and economics. Conversely, the images below portray structures that may be considered real estate.