I use quite a variety of exotic wood for my bindings. Over the years I have collected a lot of interesting binding material: Zebra, Zircote, Bubinga, Brazilian Rosewood, Koa, Macassar Ebony...
The colored (green, blue, purple, red,...) lines that I often use are dyed holly.

No plastic on my guitars!

Below is just a sampling of the type exotic hardwood bindings you will find on an Everett. I make sure that the kind of wood you have for your back and sides matches the binding material and any color trim you might want.
If you want only natural color on your guitar, I can use violin purflings to frame the guitar's bindings.