In magick, colours represent certain energies, goals, people and non-physical beings, such as deities or spiritual forces. For this reason, you should include candles, gemstones, cords and other objects of differing colours in your magick rituals. Colours also often have personal meanings for us. Anytime a person employs the symbolism inherent in colours, they are in effect using magick. Common examples of this can be found in such phrases as "green with envy", "black with rage", "feeling blue", "in the pink" and many more. The particular symbolism of any given colour may vary widely from source to source, and depending upon whether you are burning a candle, knotting a cord, draping an altar or creating a talisman. You will find that many books, such as Buckland?s Practical Candle Burning, offer different suggestions for colours when used in magick. In addition, there are also colors for astrological signs and planetary or elemental magick.
Some magickal systems use "flashing colours" - those that are complimentary, such as red and green - to create an optical illusion that appears to flash when placed together. Such "flashing colours" are said to have great power in attracting the corresponding magickal forces. "Flashing colours" can be used in almost any type of ritual or spell work where you will be using colours, particularly when the visual aspect of the color is important.
Take a quick sojourn through this door for more on the basic uses of colour in magick