This whole thing about avoiding the triple just because of supposed shifting quality issues is just not significant to most riders. Certainly a beginner is not going to have any problems with a properly tuned triple. Just get it tuned up - and this isn't unique to the triple, the compacts don't shift well if not tuned either.
Frankly, having owned both, and knowing how to tune them as well as possible, I think triples are smoother shifting than compacts because the jumps between wheels is less.
An added benefit - in my experience - is that for many riders and riding situations, there can be far less front shifting because the middle ring is very useful and can easily access the entire cassette w/o chain rub issues. There is just never any thought or issue in upshifting to larger rings - it just happens smootly and easily. Compacts are often more of a finesse thing for upshifting, in my experience.
If she likes the triple color better, there is absolutely no question - get that bike. Color is a legitimate factor in choice. Just read all the posts by vain high end bike riders about handlebar tape, seat color, tire color etc.
The added benefit to the preferred color might indeed be a better shifting situation for her.
By the way, I just bought my wife a used (09?) Dolce elite which is Tiagra/105 triple. Excellent frame, excellent fork, excellent drive train. We have big hills so the triple is really nice to have too. In fact, I might put a 9 speed MTB cassette and derailleur on the back to get her more gears.