The toga was an article of clothing that helped mark a person as a Roman male (women ordinarily did not wear togas unless they had experienced some sort of disgrace or were involved in a disgraceful occupation like prostitution). Depending on a person's age and social status, the toga they wore differed.
Generally speaking, adult male citizens wore the toga virilis ("the toga of manhood"), which was made of undyed wool.
An adult male who was a candidate for political would wear a toga that was dyed white. This was called the toga candida ("the spotless/pure/white toga").
Freeborn, citizen boys (on formal occasions) and adult males who held one of the curule magistracies could wear the toga praetexta, which had a wide, purple border.
A person in mourning would wear the toga pulla ("the dark-colored toga"), whereas a victorious Roman general could wear a toga picta ("embroidered toga"), which was dyed purple and had golden thread embroidered upon it.