While this may be tangential to the Duncan and Brady song,
I'm intrigued by the idea that was posted in the link that Brian provided that women dressed in red may represent a traditional African funeral practice of celebrating life. In this view, the color red symbolizes the person's return to the red earth. Red probably also symbolized blood=life, and menstruation=fertility in traditional African cultures and other traditional cultures.

This discussion also reminded me that some etymologists say that the name "Adam" means red "earth". Also, the early Egyptians depicted themselves with red paint {note: Some West African, Central African, and East African ethnic groups are Nilotic}.

Also, see these excerpts on the symbolical use of the color "red" in Christianity and in feng sui:

"In the earlier days of the church it was understood that a soldier could not pursue an enemy that had entered through the red doors of a church. The red doors were a symbol of refuge and sanctuary for all people who entered. To all concerned the red on the doors signified the blood of Christ that had been shed so that all who came to him could be saved. Anyone who passed through those doors was safe as long as they stayed behind them.

Over time, Christian people began to see the red doors of the church as symbolizing not only physical refuge and safety, but spiritual refuge as well. The blood of Jesus, and of the Church's martyrs, that the red doors of the church symbolized, would protect you from evil, both physical and spiritual. The red doors spoke to the world of holy ground that existed inside those doors, space that had been purged and made clean by God's Holy Spirit. Today people choose to paint their church doors red for many of the same reasons that churches did centuries ago. The Episcopal Church of the Good Samaritan, as I'm sure your church does (even if it doesn't have red doors), would like to be recognized as a place of peace, refuge and salvation for all people in our community."

Source: http://www.motherflash.com/goodsamaritan/reddoor.html

-snip-

"On a tangentially related note, red doors are also featured in feng sui:

A red door can be used with the intention of protecting the home and those inside, especially if your house is at the end of a T street intersection. Red can also be used to attract chi towards the door."

Source: http://www.timboucher.com/journal/2004/09/red-doors.html