Hi Vitthal, the land in Karnataka is mainly divided into different zones which depicts their own significance:
Yellow Zone: Yellow Zone has two different shades of Yellow in the Bangalore Map.The darker shade of Yellow signifies Mixed Residential Use properties or lands while the lighter Yellow shade signifies Main Residential use lands which cannot be used for Mixed use. In Mixed use lands of Darker Yellow, essentials like groceries, doctor's clinic, a could be permitted. Shops of the basic necessity kind.
Green Zone: A zone purely dedicated to the agricultural use or land that is protected to maintain greenery in the city. Green Zone has 4 shades - reserved for Forest, Valley, Lake, Tanks, Ponds, Parks, Gardens, Playgrounds, Cemetries, Burial Grounds, Graveyards etc.
Red Zone: Red Zone is meant only for Public and semi-Public use like Temple, Medical College, Institutions, Hospitals etc. etc.