If you didn’t know by now, green is back.

It started with the palest jade nails and jade jewelry on Chanel’s Autumn/Winter 2009/2010 runway.

Then the black nail polish obsession morphed into a penchant for all shades green, from blackened emerald to opaque mint.

And if the Spring 2010 runways are any indication, the color so commonly associated with everything from envy to environmental consciousness is officially back on its own merits: As pure, unadulterated color.

Still model of the moment, Liu Wen wore head to toe peacock green on the Yves Saint Laurent runway, made cooler with pewter accents.

At 3.1 Phillip Lim, the hue of choice was a chartreuse-y lime, done up in satin and made edgy with sheer black.

Can’t do head to toe? Add a touch in your accessories, like the printed scarf and deep emerald earrings on Liu Wen on the Marni runway. (Looks so good with gold — still going strong for spring!)

Treat green like a neutral. Just a touch of olive at Jonathan Saunders adds edge to clean lines. Tao Okamoto in Jonathan Saunders.

The freshest way to wear green is mixed with a shade — any shade — of blue. Emma Pei in a brilliant emerald green Lela Rose dress.

Get in on this trend now. Accessories are the easiest way to go green; they’ll add a pop to your fall wardrobe, or a twinge of envy for the holidays.

A python bag with a sheen — perfect for the office and drinks afterwards. Sang A “River” spring green python bag, Sanga.com.

How fabulous would this look with your LBD or a white tee? Jennifer Elizabeth “The Michelle” necklace, $175, JenniferElizabeth.com.

I love the sporty luxe look of this Nicole Brundage “Freddy” shoe.

The perfect pop of color for everyday. Ananas “Kira” bag, $299, www.AnanasCollection.com.

A pop of sea green draws attention to your eyes. Rosena Sammi “Sovereign” earrings, $170, www.ShopRosenaSammi.com.

So gorgeous, this is like jewelry and a clutch in one. I love the subversive little snake running up the middle. Rene Caovilla satin clutch.