Spice is my "go to" liner; I wear it nearly all the time (or NYX's coffee lip liner which is a good dupe.)
I wear it with everything from Blankety to "O". Unless something has a strong tone (such as really red, really pink, etc), I usually can get Spice to work. However, it is a similar tone to my natural lip color, although it is darker than my natural lip color.
I don't know why I don't like it sometimes. I bought it for a natural color too but I find myself using Dervish more becuz its lighter. Maybe cuz I wear alot of bright pinks.