Brief splashes of red in the opening scene indicating Hector’s arrival foreshadow later scenes where Hector is surrounded by red. And why red? “Red by a large margin is the color most commonly associated with seduction, sexuality, eroticism and immorality, possibly because of its close connection with passion and with danger.” (Thanks Wikipedia!) As well as setting the scene, the red backdrop is a not-so-subtle nod to the married Hector's cheating ways. (Meanwhile, gold identifies the club's fixtures and fittings: the lights, the chandeliers, and Hector's blonde date.)
Hector's wife Marnie next.