I reside in Lancaster County, PA, and in this county and Chester County, the Amish men only wear black hats for weddings, funerals, and on Sundays for church service.  They wear straw hats with a black band at all other times.  The Amish and Mennonites do get along.  The Mennonite men wear black hats, resembling a fedora, never straw.  The white caps the women wear are also distinctly different.  Amish women wear more of a stylish cap with ties that are hanging loose or in a low hanging bow, tied in the front or in the back. Mennonite women wear a white plainer cap without ties.