The traditional descriptions of the Chakras as we most know them to be follows the colors of the rainbow. However, as I continue to read more from multiple sources, I notice different descriptions among writers. For instances:

Elizabeth Clare Prophet's description:

Crown: Yellow
Brow: Green
Throat: Blue
Heart: Pink
Solar Plexus: Purple and Gold with Ruby Flecks
Sacral: Vibrant Violet
Base: Pure White

Tom DeLiso of Wisdomsdoor.com (http://www.wisdomsdoor.com/ck/chakra_des.shtml):

Crown: predominately violet in color except for the central whirlpool which is similar to golden sunlight
Brow: dark blue with or without violet and sometimes with pink-rose color coming from it
Throat: Predominately blue but with alternating blue and green sections
Heart: Golden in color but many times can dip in various shades from golden yellow to pink or light orange
Solar Plexus: various shades of red but also has random spokes that are green
Sacral: This chakra has 6 spokes each of which are a different color: red, orange, yellow, green. blue, violet
Base: red and dark-orange in hue

Master Choa Kok Sui of pranichealing.com:

Crown: the 12 inner petals contain predominantly golden prana, and the 960 outer petals contain light violet, blue, yellow, green, orange, and red pranas.2
Brow: The ajna chakra has ninety six petals, and has two divisions, each having forty eight petals. In some persons, one division is predominantly light yellow, and the other division is predominantly light violet. Others have whitish green in one division and light violet in the other. The predominant color pranas in the ajna differ from person to person, and the colors change according to a person’s psychological state.
Throat: predominantly blue prana with some green and violet pranas.
Heart: The front heart chakra contains golden and light red pranas. The back heart chakra contains golden, red, orange, and yellow pranas. The slight difference in appearance between the front heart chakra and back heart chakra, however, is that the front heart chakra contains more golden prana with some light red prana.
Solar Plexus: contains red, yellow, green and blue pranas. It also contains a little of orange and violet pranas.
Sacral: Contains red prana of two different shades, and orange prana
Base: Contains red and orange prana...contains very minute amount of unnoticeable yellow prana

Could anyone out there explain why this may be?