The 'Westworld' costume designer shares hidden style details you might have missed in season 4

Maya (played by Ariana DeBose) asks Christina (played by Evan Rachel Woods) to help her choose between white or black pumps. Fans of the show might recognize this moment because it's similar to when William had to pick between wearing a white or black hat when he boarded the train to Westworld in season one.

In season one, William chooses a black hat, which is how he eventually becomes The Man in Black, while in the season four premiere, Christina tells Maya to go with the white pumps.

"It registers something in Christina in a way, like, 'I've been through this before.' It gives the story even more layers. The point is for the audience to remember the moment because it makes it more interesting," the show's costume designer, Debra Beebe, told Insider.

In season one of "Westworld," Clementine (played by Angela Sarafyan) wears a traditional 1800s-style bustier dress in a dark-green color. For season four, Deebe used that look as inspiration for the flapper dress that "knockoff Clementine" wore to work at the Butterfly Club.

"We wanted the knockoff to look just as pretty and stand out in the same teal as Angela wears in previous seasons," Deebe told Insider. "It was fun to take their looks from earlier seasons and bring them into a different time period."

The costume designer told Insider that Christina is purposely wearing blue to remind people who the character really is.

Just like Clementine, Dolores has a knockoff version in season four. The character wears a blue dress very similar to the one Dolores wore in previous seasons.

"The knockoff was very strong in the color, the trim, and the sweetness of her style," Deebe said. "I always thought that her look in the original old west was very sweet. She was the sweet girl next door. And that's what I was going for with her 1920s look."

Deebe told Insider that the writers of the show wanted to make sure there was enough distinction between Maeve and knockoff Maeve in the 1920s episode of season four.

The dress that Maeve (played by Thandiwe Newton) is wearing in the latest season is directly inspired by her look from season one. But the knockoff Maeve was wearing a fuschia dress underneath a black fabric, which made it look darker, Deebe said.

She added that she included the same headdress Newton wore in season one to the knockoff version of her character in season four.

Deebe said that because Hale (played by Tessa Thompson) is running the world in season four, she gets to wear whatever she wants and doesn't abide by color schemes like Dolores or Maeve.

"This is her world, and everyone is playing her games, and she's controlling it," Deebe told Insider. "She can dress however she wants, wear whatever color she wants, be whoever she wants. Tessa embodies everything that I put on her."