Why are plastids called colour forming organs?

The coloured organelles present within the cytoplasm of plant cells are known as plastids. They are responsible for the formation of color of any plant part like leaves, flowers, and fruits. In absence of light plastids are known as leucoplasts become colorless. The colorless plastids are known as leucoplasts generally present in the cell of the roof and cortex where light is not available. In the presence of light, colorless plastids may develop color. So the plastids are known as the color formating organelles.