SAG Awards 2015 red carpet fashion looks and trends

Actress Keira Knightley attends the 21st Annual Screen Actors Guild Awards at The Shrine Auditorium on Jan. 25, 2015, in Los Angeles.

Frazer Harrison/Getty Images

There was a rainbow of colors and looks on the red carpet of Sunday night's Screen Actors Guild Awards -- with shades of green, red, purple and everything in between.

Sarah Hyland opted for a custom Vera Wang gown with a sparkly low-cut bodice. Speaking of low-cut, Jennifer Aniston followed her Golden Globes pants suit look with another plunging neckline -- this time in gown-form.

Julianna Margulies brought another bright color to the mix -- donning a bright blue gown with a high slit.

Edie Falco looks chic in a red Randi Rahm gown as did Sofia Vergara who also stepped out in the hue. Kaley Cuoco-Sweeting sported a red Romona Keveza gown.

A pregnant Keira Knightley glowed in her purple dress. Likewise, Matthew McConaughey's wife, Camila Alves, opted for a Donna Karan Atelier gown with a purple washed silk crepe bodice with cut-out sides A bearded McConaughey, meanwhile, looked dapper in a blue tuxedo.

Julianne Moore and Patricia Arquette both opted for shades of green, while Julia Louis-Dreyfus chose a black dress topped with lace.

No color was left on the sidelines. Actress Uzo Aduba, for instance, went for a bright yellow gown.

Julia Roberts took a different route, sporting a black pants suit.

Click through the gallery above to see all the looks and sound off below: Who do you think looked the best on the red carpet?