Magenta/Dark Purple– This is a good candle to burn with other candles when you need a speedier result.
Yellow Good for working with the air elemental fae- bringing quick changes, mental creativity and developing your mind.
White– calm and peace, spirit guidance, direction
Red Use with Fire elementals, courage, sexual relations
Gold Solar fae, money and prosperity, good luck
Black good for binding spells.
Blue dark, ending depression, changes in your spiritual dealings
Blue light, use when working with water faerie and elementals, peace, healing.
Green– good luck, good when working with earth faerie such as leprechauns, gnomes and elves bringing balance, fertility, quick money
Orange– renewing confidence, changing your luck for the better
Pink– love, healing, emotional matters
There are many other colors but these are a few to get you started. Depending on the desired results you can burn more than one color. It is important to have your candles in proper holders. When possible let them burn all the way down. If need be put them in a sink if you are leery about leaving them out in the open. You can anoint the candles and carve in the words of what you desire.