Credit: Jamie McCarthy/Getty Images for Barneys New York Photo: Blake Lively at the Barneys New York Celebration Launch of Gaga's Workshop at Barneys New York City on November 21, 2011

After tracking Gossip Girl fashion for so long, we definitely know how to spot a trend among the young and stylish starlets that make up the cast.

We swooned when we saw Leighton Meester (Blair) sporting head-to-toe blue on set a while back — but when Blake Lively (Serena) stunned the crowd at a recent Barneys event in NYC with a cobalt blue suit, we knew that this trend wasn’t just confined to the small screen!

Monochromatic dressing seems to be the next fashion feat to try our hand at, and since both Blake and Leighton (and the show’s stylist) seem to have a thing for blue, we figured that’s where we’d start too.

The great thing about dressing from head to toe in one color is that it gives you room to play with different proportions and shapes, so step out of your sartorial comfort zone with some of our royal blue picks below!

Get the blues on a budget: