The boundaries between the different classes were strict and legally enforced: members of different classes even dressed differently. Only the emperor was allowed to wear a purple toga, while senators could wear a white toga with the latus clavus, a broad purple stripe along the edge. Equestrian togas had a narrow purple stripe (clavus augustus).
Although the classes were strictly defined, there was a lot of interaction. Slaves and some freemen worked the in homes of the upper classes, like the senators and patricians. Soldiers also mixed with their officers.
Roman society also involved a system of patronage. Members of the upper classes – the patroni – offered protection to freedmen or plebeians, who became their "cliens." Patronage might consist of money, food, or legal help. Traditionally, any freed slaves became the cliens of their former owner.
