1 Anaphylaxis is the most severe allergic reaction and is potentially life threatening. 2  Anaphylaxis is rare. The vast majority of people will never have an anaphylactic reaction.  Common triggers of an anaphylactic reaction include drugs, such as penicillin, insect stings, foods (peanuts, shellfish), X-ray dye, and latex.
A rainbow has depth to it, all along the radius refraction angle of 45 degrees. A halo around the moon on vaporous clouds has red and magenta on the outside, the yellow is minor, green and cyan are the inside colors. The lighter area is to the inside. A moon bow is magenta, white, green, and rare.
Blue or Indigo. Violet (not purple) There are seven colors in the rainbow and can be remembered by the mnemonic device Roy G. Biv: Red, Orange, Yellow, Green, Blue, Indigo and Violet. An easier way of remembering the seven colours of the rainbow is by this expression: Richard Of York Gave Battle In Vain..