Why does the apple change when Jonas plays catch with it?

The apple looks different to Jonas because he sees the apple’s red color. Before he becomes the Receiver of Memory, Jonas doesn’t know how to describe the apple’s change because the community erased color to establish “Sameness.” When Jonas describes the apple incident, The Giver reveals that the change Jonas saw was color. The change is related to Jonas’s ability to “see beyond” the community’s Sameness technology and notice the true color of the world around him.