sugarpussy:

• Black – Conducive to protective spells, spells to encourage guidance from loved ones, or the gods, encourages the development and evolution of one’s own wisdom, and the wisdom of the gods.
• Purple – Promotes spiritual, and psychic energy.
• Blue – Conducive to communication, and developing better communication abilities with the gods, and with others; family, friends, etc.
• Green – Promotes natural healing, and building healing, productive energy, for both physical and emotional injuries; also encourages prosperity, and fertility.
• Yellow – Represents and is conducive to happiness, pleasant memories, and a generally more cheerful environment; also promotes success in various venues.
• Orange – Promotes creative feelings, and atmosphere.
• Red – A high energy source for spells, represents strong emotions and passions, or encourages more passion at home.
• Pink – Encourages feelings of romance, or romantic love, an excellent ‘love spell’ candle; also represents and encourages compassion.
• White – Signifies innocence, also used for manifestation spells, whether physically manifesting a desire, or emotionally manifesting a feeling in oneself or others; also a strong source of neutral energy.
• Brown – Protection for pets, and livestock, also conducive to domestic problem solving, and peace in the home.

(Source: candlespells.com)