The jewelry should neither overpower the dress by being too large and gaudy, neither should it be so understated that the jewelry gets lost in the finished ensemble.
While some of the colors and styles of dress may seem gaudy when seen up close, the fact is they are not meant to be seen except at a distance - often over twenty-five feet away.
To keep them from looking boring, the boots have just enough detailing to make them interesting, but not so much that they look gaudy or out of place with patterned outfits.
While tracking down the original color may prove a tad bit challenging, there are some other colors similar to OPI nail polish in the color Peachaboo that will give you the same feminine sparkle without a gaudy finish.
When it comes to buckles, you generally want to avoid anything too big or flashy, as you run the risk of looking gaudy, unless you're going for a real cowboy look.