The setting is meant to be subtle & white, to display a focus on the characters emotions. Julius listens to Calphurnia's concerns about the dream she had. She's pictured here in burgundy to represent what class she is in & whom she is married to. She is also much smaller in height here to give Caesar more power in the scene. She displays a worrisome face because of the series of events she visioned in her dream.
Here, Caesar truly listens to his wife's wisdom & attempts to comfort her as she begs him to cancel his visit to the senate. His face displays sincerity because he considers Calphurnia's request to stay home. Calphurnia is on her knees begging Caesar to stay because although she doesn't normally believe in omens, this dream (which is a thought bubble attached to next scene) has her extremely worried about Caesar's fate.
The bubble shows the vivid dream Calphurnia dreamt. The color red generally shows bloodshed. The building behind them is to represent the senate, & it's in a soft hue because the people & actions are more the focus of this scene. Caesar is surrounded by numerous knives with blood dripping from them because he was surrounded by people who stabbed him. Also, he has countless wound holes on his body. However, the most fatal stab of all was from his best friend Brutus, hence, he is a diff. character compared to his fellow criminals. The other criminals are all just duplicated to show that Brutus is the one who had the pure intent & most hurt to rid onto Caesar.
Decius enters the scene & Caesar converses about the reason he wouldn't be attending. Decius, with mischievous intent, convinces Caesar otherwise. Calphurnia continues to beg Caesar as he now finds her suggestion to reside home, foolish. He believed that the Gods were testing his bravery, he refused to be fearful of death, however the idea of crown from senate also convinced him to go. Caesar is also placed facing away from Calphurnia as he disobeys her foolish suggestion & proceeds to accept the invitation to the senate. Calphurnia is still seen begging on her knees, but with her head hanging in despair.
Caesar makes his decision to attend to the senate meeting. Here he is facing away Calphurnia & brushing her off to be a foolish fearful woman. His thought bubble reinforces the idea of potentially being crowned at the senate (which is symbolized by the building). There is a greek crown above the senate building to represent the potential of the meeting in his mind. Also, to reinsure his reason to go, he once again practices his free will by rejecting Calphurnia's absurd idea of the fear of death.