What is indicated on a geographic map by shades of green, yellow, brown?

Low places up to 200 meters above sea level are depicted in green on the maps – these are plains, or lowlands. The hills are depicted in yellow. They are located at an altitude of 200 to 500 meters above sea level. Mountains are shown in brown on the map. The higher the mountain, the darker the brown. The mountains have a height of 500 meters and above sea level.