In Parshas Teruma it mentions Argaman. The way it was translated in Yeshiva was purple. Is Argaman really purple? [Shir Hashirim 7:6](http://hebrewbooks.org/pdfpager.aspx?req=40069&st=&pgnum=49) says V'Dallas Roshech Ka'Argaman. Rashi, Rashbam, Even Ezra, Metzudas Davis, Malbim all translate this to mean the color of the hair is like Argaman. I have never seen non dyed purple hair! So what color is Argaman? (Sources please)