A high percentage lard soap, coconut oil, canola or sunflower oil, and castor oil will give you a nice white bar and easy to work with when playing with colors. Pomace and extra virgin, while they give white bars they are harder to work with coloring if you are just starting out. Pure Olive oil from Costco and Grade A refined from Soapers Choice are both good choices for a light olive oil. Pomace olive is a good oil for Castille Soap, but is a dark green rendering it harder to work with if you want to play with color. There is a recipe on Miller Soap for a high Canola & Olive soap called Canolive and it is an easy to work with and a great soap. Canola oil brings a fatty acid to the soap profile that most oils do not contain, and it does not cause DOS like some think, because of the high Canola oil. I had one of these bars from a soap swap for over a year and loved it. It was used periodically throughout the year. I wanted to see if it would go rancid and it did not. It is also an easy recipe to work with. Happy soaping!