I just wanted to say that for one I'm sorry that everybody on here tried to make you look silly, when really this is a valid question. I have worked at a hospital for 2 and a half years now and have always thought about this. I have naturally dark hair which I tend to keep in the winter, and very blonde hair in the summer. I can without a doubt say that I get treated with way more respect and competency when my hair is dark than when it is blonde. In my experience, I have made it a goal to prove myself despite my hair color, as I'm sure you'll do the same thing, but just by first impression, I often am not taken seriously and get ignored frequently. Just do you and prove yourself, that's all that really matters, eventually people will get past your hair color.