How Long Does It Take for Blue Shampoo to Work? A Complete Guide to Color Correction

Understanding Blue Shampoo: Why It Matters For individuals with dark hair, especially brunettes or those with black or brown tones, maintaining vibrant, cool shades can be a challenge. Over time, exposure to heat, UV rays, hard water, pollution, and chemical treatments can cause the hair to develop unwanted warm undertones—think copper, red, or orange hues. … Read more