Photo: Hemera Technologies/AbleStock.com/Getty Images
When you're going a few shades lighter, it's a common thing to see hair turn a bit brassy, with that undesirable orange or yellowish tone. One way to fix this is to add a toner such as Wella's Color Charm Toner line. Wella's toners come in silver, ash and beige tones. Before applying the toner, Wella recommends having your hair a half-shade lighter than you would like it to end up. Be sure to have your hair shampooed after the lightening so the lightener doesn't continue to work on your hair.
Select and purchase the color that you desire from the Wella Color Charm Permanent Haircolor chart. Look for the toner colors on the right hand side of the chart, and use the "Pre-Lighten" color indicators on the chart to select the color that you currently have; this will allow you to choose the best color to remove the brassy tone from your current color. Also purchase a bottle of Wella's 20-volume developer.
Mix one part toner with two parts Color Charm 20-volume developer.
Isolate a small section of your hair to perform a strand test. Apply enough of the toner-developer mixture to wet the strand, and then allow it to sit on the hair for a few minutes.
Rinse and test the color every five minutes for up to 30 minutes until you get the color you want. Note the length of time it took to achieve your desired color.
Section your hair into several smaller sections with hair clips, and then apply the toner-developer mixture to each section with an application brush or squeeze bottle.
Rinse a small section of the hair after the anticipated time to check the color; if it's satisfactory, rinse your entire head of hair with water.
Apply a conditioner to the hair, allow to sit on the hair for at least one minute, and then rinse out.