If you opt not to prepigment the hair and want to choose a hair colour, it’s essential to select shades with warmth or red undertones. These shades typically fall within the .035 to .036 range, which includes natural, gold, mahogany, and red tones.
Keep in mind that if you apply these shades over blonde hair, the red undertones may shine through in the final colour result. It’s crucial to communicate this to your client, as they should be aware of the potential warmth or redness in their hair after the colour application.
If your client prefers to avoid visible warmth or red tones in their hair, it’s advisable to prepigment the hair first before selecting the final shade. This ensures better control over the colour outcome and allows you to achieve the desired result without unwanted undertones.