Celebratory Flags for Naboo - The Phantom Menace 1999

 Several flags and vexilloids appear during the celebratory sequence on Naboo in the first Star Wars prequel The Phantom Meance 1999.  The most noticeable flag can be seen in the hands of a boy in the background.  It is a traditional flag as used on Earth, but represents some unexplained element of Naboo culture.  It is composed of the colours blue, yellow, and purple.

In addition to flags the people of Naboo uses flag streamers with the livery of the nations.  Which includes the colours purple, pink, and blue, red, and while. 

Along the building you can see what looks like a royal standard of red and purple with a slight swallowtail.  Who or what it represents exactly is not explicitly explained in the movie.  Nonetheless, it is a remarkable type of flag of social importance.