Works Best On: Neutral skin tones that don't have too many red or pink undertones. Any eye color can rock these hues, but blues are especially flattering.

"Ladies who already have a lot of pink undertones in their complexion should avoid these hues because they're already close in color," Godard says. In other words, fire-engine reds and subtle pinks will bring out ruddiness if you already have a pink complexion.

These colors are a definite must for blue-eyed babes, since it will make their peepers pop. "Reds and pinks enhance blue eyes because orange [a similar shade] is opposite blue on the color wheel," Godard explains.

Try: For a brilliant red, try Ion Color Brilliance Semi-Permanent Brights Hair Color, $5.29, in Red. For a pretty, vibrant pink, try in Magenta. (Please note: You will also need a developer with this product.)

This brown-eyed beauty rocks her pink 'do by allowing her dark roots to peek through. The subtle growth acts as a transition to her colorful hair, creating an overall gorgeous look with her pretty pink curls.

There's that stunning contrast Godard was talking about. While this red-hot color looks absolutely gorgeous freshly dyed, most colorful hairstyles fade quickly. To extend your color, Godard recommends shampooing less frequently (get on that dry shampoo, girl) and using a color-protecting shampoo like Redken Color Extend Magnetics Sulfate-Free Shampoo, $18.50, when you do suds up.

Green is also opposite red and pink on the color wheel; so green-eyed ladies like this beauty look absolutely stunning with this eye-popping hair color.

Works Best On: Fair to neutral skin tones, due to the cooler undertones of their skin. While Godard says any eye color can rock this color, it complements blue-eyed gals the most.

Mermaid-like hues are some of our favorite colorful hair looks to ogle, but note that, they don't always flatter the tanner ladies. "These colors should be avoided by the olive complexion because they could enhance the natural green tones in the skin," Godard says. Though we will point out that Nicole Richie rocked it all the same, thank you very much.

Try: Manic Panic High Voltage Classic Cream Formula Hair Color, $13.99.