While I was away I learned a LOT about coloring hair (especially blondes). The most important thing I took away was that many of us color our hair without any thought of the specific shade. No one likes brassiness, and natural (matte) colors wash us out...? What's a girl to do?
During our class, we did spend some time talking about what natural hair shades, skin tone, eye color, eyebrow color, and lash color can do for you when you're deciding what color to be or what color to try. In my humble opinion, there's always going to be a color that suits you best considering the guidelines I mentioned earlier. They aren't set in stone, but they do make sense in what would look harmonious with your natural coloring.
If you're one to try any color REGARDLESS of your coloring, that's awesome! I think life's too short to stay the same shade but let me say this. If you are venturing out in coloring your hair in a shade that is VERY unnatural, be prepared to do some work. You might need to change-up your entire make-up regime. Maybe your wardrobe would need some updating, and more often than not, you'll be spending quite a bit of money to maintain this 'crazy color' you've chosen for yourself.
The next time you're in the shop seeing your stylist, ask him/her about shades that are most flattering to your natural state. I will be honest, not every stylist will know what to look for, but I'm hope your stylist would be able to be honest with you if they didn't know. At the end of the day, you need to decide what color you think you feel the best in, and what color is the easiest on your lifestyle and your wallet. There are a lot of factors that go into coloring your hair including proper products.
There are so many tones of red, blonde, brown or black that you can be, so don't feel like your options are limited. Take the time to find out what shade would be most flattering to your natural coloring. Ask a professional and see what they say... You might be surprised.