Back-to-school season ushers in cool weather, early morning coffee and new fall fashion trends.

Barbie core took over the summer with pink and pastel outfits seen all over social media, but the fall is seeing a shift to a darker, moodier palette.

Many major fashion publications like Glamour and InStyle are claiming red as the major color of the season. Stella McCartney and Elie Saab both featured all red looks on the catwalk.

Shades of yellow, green, navy and black have also been popular on the fall runways. For those who love prints, artistic designs with celestial, fruit or floral patterns have been seen all over.

Casual chic and business core are main style trends of the season.

Business core hearkens back to bold, oversized pant suits of the ’80s and is complete with black neck ties, white button downs and great tailoring.

Casual chic is being defined by white tees, oversized blazers and wide-leg jeans. The look is similar to the model-off-duty styles you might see on Sofia Richie or Kendall Jenner.

The 2010s is seeing a brief resurgence with the peplum top and dress appearing on the runways of Moschino, Paco Robanne and Christopher Kane.

In general, sculpted or structured tops are a season favorite with off-the-shoulder and barely there bralettes seen all over the runways.

For all the spooky season lovers, dark romance vibes have pervaded designs with Victorian style lace, dark velvets, dramatic flourishes and stark black makeup and clothing.

Cozy fall staples like fuzzy outerwear, sweater dresses, neutral layering, preppy tartan and leather skirts and jackets are still coming back.

Overall, if you’re looking to spruce up your fall wardrobe with new clothes, the oversized blazer is the best piece to look out for. It fits into most of the current style trends, and a good blazer can last you many seasons even as trends change.