Matrix SoColor Power Cools Low Ammonia Permanent Hair Color (3 oz) - 4AA Dark Brown Ash

*Packaging may appear different due to brand manufacturer update. **Shade name may differ, however, as long as the shade number is correct, the color will be correct. For instance, 6A may say "light brown ash" or "dark blonde ash". It's the same color simply described differently.What it is: POWER COOL DYES a superior dye calibration of blue and violet tones to ensure the coolest results in the Matrix portfolio.What it does: LOW-AMMONIA provides a steady, more controlled lift for reliably cooler results without compromising the level of lift.; What else you need to know: BRASS NEUTRALIZING dye combinations allow each shade to stay true-to-tone and last up to 8 weeks.