Three Must-Live-By Tips for Your 40s

For hair color: "Don't let you hair color age you," says colorist Eric Muroski. "The blonde, brunette, and auburn hues that you wore in your 20s and 30s aren't necessarily the same shades that will work best for you in your 40s. Talk to your stylist and colorist and find a shade that works for your skin tone and your lifestyle. If you have less time to dedicate to — or interest in maintaining — your color, then that's something to consider."

Another thing to consider: going gray. Long gone are the days when "old and gray" was a colloquialism. From Lady Gaga on the cover of the September 2010 issue of Vanity Fair to 13-year-old fashion blogger Tavi Gevinson, celebs are welcoming — even inviting — their grays at a younger and younger age. It’s all about attitude!

For your wardrobe: "I maintain that you can wear almost any style, regardless of age, just as long as you find the right cut and the right detailing," said stylist Patrick Fields. For example, you can absolutely still wear skinny jeans and leggings in your 40s and 50s. The key is to choose something with more structure and flattering lines — it's all about fit and fabric. The right cut and tailoring will look great and make you look longer and leaner, which will give you the confidence to pull anything off!"

For makeup: "This is no longer an age when bright blue eye shadow works for most people," says makeup artist Landy Dean. "Keep your makeup natural-looking, but break up neutral tones with cooler ones to bring dimension and definition to your face. A soft smoky eye is completely appropriate for all age groups and looks great when paired with long, full lashes."