I designed this flag with tourism in mind. Usually, and strangely, islands have great flags, like Jamaica, the Bahamas, and Nauru. But Hawai'i's flag wasn't very tourism-friendly. I'm not sure if this is, either, but I think it is.
The main feature is a representation of a volcano, with a mountain represented by a green triangle, and lava represented by the red chevron. The light blue is used to make the flag look good. The blue and red represent the United States.
The current Hawai'i flag has the Union Jack (that's the flag of the United Kingdom used as a jack) in the canton and eight white, red, and blue stripes. The colors used were not very attractive, to me, at least, and the Union Jack made it seem like it wasn't a part of the United States. Also, it hurt my eyes.
How's this? Better, isn't it? Yeah!