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From the runway to the red carpet, crimson-colored tresses have emerged as a key trend for spring '09. And, just like a must-have accessory or the latest hairstyle, changing color families can be a great way to refresh your look. 

To ensure our success, I've asked celebrity colorist Lindsay Rivera— of Neil George Salon in Beverly Hills— for her expert advice:

Why go red?
Someone should go red if they are looking for something playful and new and maybe if it’s something they’ve always wanted to do!

Which shade(s) of red best suits fair/medium/dark skin tones?
As far as matching skin tones— fair skinned ladies should stay on the warmer side, with strawberry blondes and more coppery tones. Medium skin can go with a beautiful cinnamon shade, or even to a deeper auburn. For those with a darker complexion, red can be tough if you want it to look natural. So those with darker skin tones are best handled on a case by case basis, but the most suitable shades are the very deep tones.

What are the best ways to ensure an A-List outcome?
To make sure you have the best transition to red, you should definitely bring a picture of what you are looking to achieve. It is important to keep your skin tone in mind. If your complexion is like Jennifer Lopez, and you pull a picture of Julianne Moore— you have some more thinking to do! In switching from blonde or brunette to red, you should be prepared to warm up and make subtle changes your makeup and wardrobe to better suit your new scarlet locks.

...So, will you be joining the likes of Lindsay and Scarlett this season?