I actually prefer to use the Foca on my colored loads as I think the bluing kind of "perks the colors up" a bit. I also like that if my clothes are really dirty like from working in the garden,I can use plenty of it if need be. I can even use it in my FriGEMore without sudzing it up too bad.
Viva is my favorite, however I can't use it in copious amounts in certain of my machines or it causes sudz-lock. (I think the 'Kenmo would sudz-lock on air alone, so it plum chokes to death on Viva and the 1-18 would do the same I'm sure!).
Unlike Viva, Foca has a light fresh scent to it that will rinse out almost completely. IMO a great product.