Blue shampoo is used primarily to neutralize brassy orange tones in hair, especially darker shades like brunettes or hair with red undertones. It deposits blue pigments that counteract orange tones, resulting in a cooler, less brassy hair color over time. The effects are cumulative and improve with consistent use over several weeks, rather than one immediate wash. People with blonde or silver hair may use purple shampoo instead, which neutralizes yellow tones more effectively. Before using blue shampoo, hair may show visible brassiness or warm orange tones especially in natural or color-treated hair. After regular use—typically once or twice a week for a few weeks—the brassiness diminishes, leaving a cooler and more vibrant hair color. Blue shampoo may feel less cleansing than regular shampoo, and some formulas can leave hair feeling drier or less voluminous. However, it generally improves hair tone and prolongs hair color vibrancy. Using conditioner after blue shampoo can help mitigate dryness. In summary:
- Before: Hair shows unwanted orange/brassy tones.
- After: Cooler, less orange, and more neutral hair color.
- Use: Typically once or twice weekly; effects build up over weeks.
- Suitable for brunettes and darker hair with orange tones.
- Blonde or silver hair usually benefits more from purple shampoo.
These results are shown in various before-and-after photos and user reviews demonstrating the neutralizing effect of blue shampoo on warm hair tones.
