Jealousy? Loyalty? ... Mourning ?

Yellow -  in India - sacred color ; Greece - sadness ; Thailand -  royal color ; France - jealousy ; Buddhism : wisdom ; Egypt - color of mourning ; U.S.A./Canada - hope, faith, loyalty.
 Personally , i always went with "faith" on this one. I love France, but how can you bring yellow roses (which are pretty awesome) to someone as a symbol for jealousy ? Personal opinion only : if red roses represent love, and are the "most" important, yellow ones should definitely be on the 2nd place-loyalty-.