Porphyrophobia refers to the fear of the color purple. While it's not a commonly known phobia, there are synonyms that can be used to describe a fear of certain colors. Chromophobia is the fear of all colors, while xanthophobia is the fear of yellow and erythrophobia is the fear of red. Luteophobia is the fear of light, while melanophobia is the fear of dark colors. While phobias may seem irrational to some, they can be debilitating for others. Seeking help from a mental health professional can lead to effective treatment and a decrease in symptoms.