What type of toga, fully purple, was worn by triumphant generals?

The toga worn by triumphant generals that is fully purple is known as the toga picta. This garment was a symbol of victory and was typically adorned with intricate designs, including images and elaborate patterns, which distinguished it from other types of togas. The toga picta was exclusively reserved for special occasions, particularly military triumphs, and represented the conqueror's elevated status and honor in Roman society.

In contrast, the toga praetexta, which also features a purple border, was mainly worn by magistrates and freeborn boys up until they reached adulthood. The toga candida was a bright white toga worn by candidates in elections, signifying purity and fairness. The toga pulla, a dark-colored toga, was associated with mourning and was worn during times of grief. Each of these togas served distinct purposes within Roman culture, but it is the toga picta that signifies triumph and victory, making it the correct answer to the question.