Fire and flame are perceived to be direct physical manifestations as much as they are symbolic representations of the spark of creation. This link between the realms of the physical and the spiritual has been honored in ritual and ceremony since our most ancient histories. Lighting a candle in ritual is a call to the higher self and forces of creation.
It is said that the different colors we perceive everyday are the direct effect of each color's own unique wavelength, or frequency, within the visible light spectrum - so it is held that each specific color has it's own unique energy. The ancient Greek sophists philosophized over these frequencies; believing there to be a connection between the colors, the musical notes, the known objects in the solar system, and the days of the week.
The vibrant hue of orange is known to evoke ambition, concentration & creativity. Orange candles are best used during career workings, or any other time you need to assert your strength and individuality.
The color of other-worldly realms and magick, purple is most commonly associated with psychic matters. Use a purple candle for divination, astral travel, and to enhance your connection with the unseen realms.