It's already there in the wiki.
Just go to any piece of armor in a set. For instance, if you wanted to see the Shaman Skyshrine armor (Wolf Caller armor) you could go here:
http://wiki.project1999.com/Wolf_Caller%27s_Breastplate
At the bottom are two fashion categories. One will tell you the general look of the armor, while the second will tell you the tint (color). For instance, the Wolf Caller armor has a tint of
http://wiki.project1999.com/Category...n:_Bahama_Blue. Some armors have no tint, in which case the armor will typically be black or gray, but not always.
If you click on either category there's a chance you'll even find screenshots of someone wearing the armor, but unfortunately the wiki doesn't yet have screenshots for all armor types. If there isn't a tint screenshot, there should at least be a square that demonstrates the tint color.
In the case of Wolf Caller armor, you'll see only one screenshot, of it being modeled by a handsome Barbarian male.