Chromoplasts are the type of plastids that contain coloured pigments other than chlorophyll. They usually contain red, yellow or orange carotenoids. They are found in cells of flowers, fruits and some vegetative parts of plants, imparting shades of red, orange and red.
Chloroplasts are the type of plastids that contain green pigment called chlorophyll. These are found in large number in mesophyll cells of leaves. These cell organelles are responsible for photosynthesis.
Leucoplasts are the colourless plastids. Their funtion is storage of proteins, fats, starch , etc. They are largely found in cells of storage organs such as tuber, fruits, seeds, etc of different plants.