As with any good thriller, The Voyeurs uses fashion to convey warning signs about specific characters and scenes. Obvious signs include the "Stress" t-shirt Thomas is wearing when Pippa becomes too involved in Julia and Sebastian's lives and Pippa and Thomas's bandit Halloween costumes which they wear while on a mission to infiltrate their neighbors' home.
Another obviously symbolic moment occurs when Julia is trying on glasses at Pippa's optometry clinic. "The great thing about getting new glasses is you get to decide who you want to be," Pippa says before Julia replies, "I guess I am the femme fatale," which alludes to the fact that she knows she's playing a role for Pippa and Thomas.
More subtle examples include Julia's love for the color red, including the red coat she wears when she first meets Pippa, the burgundy coat she wears to Spa Du Tilleul, her red glasses at the exhibit, and the red coat and orange gloves and beret she wears after leaving her interview about The Voyeurs photography experiment. These colors turn her into an automatic red flag. Similarly, Pippa is rarely seen in a sweater or top that isn't covered in stripes, labeling her as a target.
