Final answer:
The eye color of the client is not a relevant factor to consider when formulating a haircolor.
Step-by-step explanation:
When formulating a haircolor, you should always ask all of the following questions EXCEPT:
- What is the desired haircolor?
- What is the client's natural haircolor?
- What is the client's skin tone?
- What is the client's eye color?
When formulating a haircolor, it is important to consider the client's desired haircolor, their natural haircolor, and their skin tone. However, the eye color of the client is not a relevant factor to consider when formulating a haircolor.