Numbers and colors are at the core of Hoodoo and Voodoo symbology. It is hard to definitively say where the importance of the number seven came from. The number seven is integral to many Native American belief systems, representing the seven sacred directions, and it is commonly known that much of Hoodoo and Voodoo came from the indigenous knowledge of the healing plants and herbs in ritual and healing practices. In addition, it is believed that the availability of the Jewish menorah candle holders were widely available and purchased by practitioners and ultimately the use of seven candles, seven colors, and the number seven in general were incorporated into the practice.
If you research the topic at all, you will find discrepencies into the meanings of the seven colors. I am offering one interpretation of the meanings of the seven colored pins found in new Orleans Voodoo. Note that this interpretation is based on right hand Voodoo practice.
Symbolism of the 7 pin colors:
yellow - success
white - positive
red - power
purple - spirituality
green - money
blue - love
black - repelling negative energy
Books You Might Enjoy:
Arthur Edward Waite - The Secret Doctrine In Israel.pdf
Sekhet Sophia - The Alexandrian Book Of Shadows
John Dee - The Hieroglyphic Monad Latin Version Second
Christopher Siren - Sumerian Mythology Faq