Really? You think yellow and green look tacky?? I love those colors together. Those are actually my colors lol. Well, the primary color is sage/olive green and then I'm having sunflowers as my main bloom. But anyhow, if you really don't like that color combo, then how about green (such a sage) along with a lilac or a periwinkle? My cousin is getting married in 2010 and those are her colors. Maybe even a baby blue?