Final answer:
The provided texts do not mention a character named Mr. Budd or the result of his customer's hair coloring, but highlight Bernice's hair being cut into "lank lifeless blocks," affecting her appearance negatively.
Step-by-step explanation:
What Color Did Mr. Budd's Customer's Hair Ultimately Turn?
In the collection of stories provided, there is no direct mention of a character named Mr. Budd or the specific outcome of his customer's hair color change. The texts referenced discuss various characters and situations, from Amy's exploration of identity to Bernice's dramatic haircut, but do not detail an event where Mr. Budd colors someone's hair. The closest scenario that involves a transformation of hair is the moment where Bernice's hair turns into "lank lifeless blocks" after being cut, making her feel "ugly as sin".
This change strips away her "Madonna-like simplicity" and leaves her feeling average and embarrassed. However, this relates to a haircut rather than a color change. Without further context or information from the story or book in question that features Mr. Budd, the ultimate color that his customer's hair turned cannot be accurately provided.