Which of the following is not a colourless plastid?

Amyloplasts and elaioplasts are both colorless plastids. Amyloplasts are responsible for storing starch, while elaioplasts are responsible for storing oils and fats.

Proteinoplasts are also colorless plastids that store protein.

Rhodoplasts, on the other hand, are pigmented plastids that contain red pigments, such as phycoerythrin, and are found in red algae. Therefore, they are not colorless plastids.