What did the 'scarlet cloak' represent in ancient Rome?

The scarlet cloak was symbolic in that it was associated with neat clean women who were respectably going about their business visiting their neighbours or attending worship on a Sunday.
https://www.quora.com/What-did-the-scarlet-cloak-represent-in-Ancient-Rome

In the Roman Catholic Church, scarlet robes - symbolizing the color of arterial blood - are worn by Cardinals as a symbol of their willingness to defend their faith "unto the shedding of (their own) blood.
https://en.wikipedia.org/wiki/Scarlet_%28color%29