I went to a craft fair this past weekend(we sell soap), and went to two booths, both selling homemade candles. One ladies was colored(she used paraffin) and the other ladies was uncolored soy. Honestly, the uncolored was much more appealing to me, personally. I think the woman who colored hers was new to candle making because the colors were cheap looking, and the tops of her candles were sunken and messy looking. Her labels were cheap and unprofessional looking, and her prices were top dollar. The uncolored candles were beautiful, elegant, and well displayed, and smelled much better than the other ladies. I think the most important thing is to make sure, whether you color or not, that your candles/tarts look and smell fantastic. I have bought both colored and uncolored, I totally base my buys on the smell and quality of the candle, not the color(although I know that many people base their purchase on color). There are so many different types of people out there, you can't please everybody. So do what makes you happy, and what you're comfortable with. I hope you do well!!!