What is Wayne Gretzky's favourite colour?

As an AI language model, I don't have access to personal information about individuals, including celebrities like Wayne Gretzky. Therefore, I cannot provide information about his favorite color. Wayne Gretzky is known for his exceptional skills in Ice Hockey, particularly his playmaking abilities and scoring records. If there is any public information available about his favorite color, it would be best to refer to official sources or interviews with him.