http://www.gellycandle.com/ColorChart.html This is a very basic chart - it should give you a starting point, hopefully - I have found it to be useful to a point
Are they glossy? I know some people have had issues w/their glossy labels yellowing. Oddly enough, I haven't had issues w/my glossy's, but my matte hang tags are yellowing...anyhow, if you do a search on glossy labels or something of the sort you will probably see some more info...
What Deb said - and btw, I think a lot of us get into it because we think it will be cheaper to make our own, but be forewarned that it is a very expensive hobby, especially starting out. But welcome and have fun!