Rachel is a 35 year old school teacher who has no man in her life and lives with her mother.
Each element give off a particular color when heated in a flame. (Some are colorless). Copper gives off a green flame but to do that there must be some copper compound IN the flame. (there are many other elements that also could be causing a green flame).
Because the non-burning center of the lower part of the flame is relatively cool, whereas all of the tip is aflame and thus uniformly hot throughout. Provided your backyard lighter flame is free of contaminants that might skew the color, a slightly lean violet-blue flame is the hottest.