Yes, using a clarifying shampoo before coloring your hair can be beneficial. Clarifying shampoos are designed to remove product buildup, excess oils, and other impurities from the hair. By using a clarifying shampoo prior to coloring, you can create a clean canvas for the color to adhere to, allowing for better color penetration and more even results. Additionally, clarifying shampoos can help to remove any residual styling products or silicones that may hinder the color's ability to bond with the hair. However, it is important to note that clarifying shampoos can be drying, so it's essential to follow up with a moisturizing conditioner or hair treatment to restore hydration to your hair.