The Armenian tricolor was created by the government of the First Republic of Armenia, based on the colors of the late Rubenid Dynasty (red, blue, and yellow), with yellow changed to orange for aesthetic reasons. According to the Armenian Constitution:
The red emblematizes the Armenian Highland, the Armenian people‘s continued struggle for survival, maintenance of the Christian faith, Armenia’s independence and freedom. The blue emblematizes the will of the people of Armenia to live beneath peaceful skies. The orange emblematizes the creative talent and hard-working nature of the people of Armenia.
Nagorno-Karabakh is an Armenian enclave within Azerbaijan that declared itself independent in 1991. It uses the flag of Armenia with a zigzagging white stripe in the fly to represent its separation.
Every four years, Armenians from around the world gather in Yerevan to compete in the Pan-Armenian Games. Alas, the flag is literally a logo — a “fire tricolor” — on a white field.
To symbolize the centennial of the Armenian Genocide, the Armenian government has created a Forget-Me-Not emblem, each element of which is symbolic. (Thanks to Patrick Genna for pointing this out.)
Some images from Flickr: