Personally, I like my hair color. True, it's a fairly standard brown, but I think it suits me. So I've never seriously considered coloring my hair. I mean, what's the point?

But actually, I've learned that there's a lot more to hair color than just going from brunette to blonde. Hair color can also add shine, dimension, even give flat hair like mine a nice volume boost.

Don't believe me? Then check out these makeovers below. These women all had perfectly fine hair color to begin with, but they gave their looks extra oomph with some dye:

Makeover No. 1: Thicker Hair Through Highlights

Audrey's hair (above) was a little limp, but instead of piling on the volumizing hair products, she opted to get highlights. Click here to see the major difference it made in her hair (and learn how you can get the same results).

Makeover No. 2: Give Yourself a Glow with Blonde Streaks

Lucy added light blonde highlights to her hair (and used her naturally dark blonde shade as lowlights), to brighten up her complexion and add more shine. Check it out here -- and get tips to brighten up your look too!

Makeover No. 3: Add Dimension to Dark Hair

Shaheen's ultra dark hair is beautiful, but a bit one-note. Lightening it too much would look way fake, but strategically placed color gave her a whole new look -- see it here!

Makeover No. 4: (Quietly) Unleash Your Wild Side

Have you been longing for a bold hairstyle like Claire? It can be tough to balance your funky side with a look that's also work-appropriate, but we've done it. Click here to see it.

• Looking to do your own at-home hair makeover? It's easy with these tips.

• None of these your style? Find tons more hair color inspiration here.

• Ever wonder what your hair is saying about you? Find out here.