Honestly it depends on where you are looking to work.

I worked for a health insurance company in Central MA and there's no way "hair of an un natural color" would have gotten you a job. And would have gotten you fired had you done it after hiring. But I worked for another company is Worcester county that had no issues with dyed hair, tattoos, piercing's etc. Granted that company also has a VERY high turnover rate and lays off a majority of their cs and sales reps every fall right before Thanksgiving, and then has a Hiring Event every spring. Retail? No problem. Restaurants? No problem. Professional offices. Problem. Heck. I know some horse stables that will not hire people with dyed hair, tattoos, or piercing's.