How are eddie's emotions directly connected to colors Albom uses?

After his death, Eddie travels through endlessly changing colours in between various stops in Heaven. These colours represent the dynamic shifting. The colours also bring out memories with all their pleasure and their pain: the sacred and prophane. At times Eddie is floating in a reddish pink sky. At other times he remembers the dark brown of Marguerite’s hair or staring at the blue-man his new existential therapist. Colours begin to define Eddie both in life and his afterlife.