Dear Readers: To mark my final week writing this column, I’m rerunning some memorable Q&As. Dear Amy: We are planning a costume party at my workplace. We all decided to dress up as people from an iconic TV show. However, two of my coworkers, who are light-skinned, are going over the top to change their skin tone to match the darker-toned cast members of the show. I personally do not feel comfortable with this.