The way I remember, chastity is unicorn, it was mentioned even in the Bible. The pelican, which is a good old Christian symbol is either kindness or charity, as they believed that a pelican feeds its young with its own flesh.
Gotta look into the rest of them tomorrow.
By the way, are you looking for the Christian symbols? Because this seven heavenly virtues is a Christian thing, so I tried to focus on the Catholic catechism. :>
Also, I have no idea about colours. I'd say chastity is white, hands down, but I have no source or anything.
Ne szólj, ne sírj, e bonthatatlan
Börtönt ne lásd;
És én majd elvégzem magamban,
Hogy zsarnokságom megbocsásd.