Does Diet Dr Pepper Have Red or Purple Dye?
                                
                                
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                                    4 min read                                
                            
                                According to the ingredient list on a standard Diet Dr Pepper can, the beverage relies solely on caramel color to achieve its signature dark hue. This often comes as a surprise to many, as the distinct maroonish color can appear to have a reddish undertone, sparking questions about whether Diet Dr Pepper has red or purple dye.