Brassiness occurs when you lighten your hair to a color with undesirable undertones. From screaming orange to baby chicken yellow, undesirable undertones can quickly turn your home hair color into a nightmare.

  Avoid Brassiness

•  Formulate your hair color correctly:  Be cognizant that "ash" counters red; "cool", "smokey" and "beige" all counter orange and "platinum" counters yellow. Note "ash " is a commonly used color description for toning many hair colors. 
•  Refrain from refreshing your hair with the same hair color you've just used on your roots. Instead a color shampoo or color conditioner adds color to your ends without damaging your hair. After a time or two of coloring your hair this way and rinsing it as described as below, you'll find the condition of your hair improving and your hair color lasting longer.
• Keep your hands to yourself as you rinse your hair color. Let the water rinse through your hair until the water runs clear. If necessary, use your fingertips only to loosen the hair color at your scalp. Otherwise, keep away!

   Rid Yourself Of That Brassy Hair Color

• Neutralize and tone baby chicken brassiness in your light blonde, silver or gray hair with purple shampoo.
• Purple shampoo on orange, gold or "red" hair though will make the brassiness worse.  Blue shampoo is the better toner. 
• For orange, gold or "red" brassiness, purple shampoo will make the brassiness worse.  A blue shampoo is the better choice.