local color

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The interest or flavor of a locality imparted by the customs and sights peculiar to it.
• noun The use of regional detail in a literary or an artistic work.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Aspects of a location that distinguish it from neighboring communities; the collective customs, mannerisms, fashions, artwork, accents or traditions of an area.