What did dr kings coffin look like?

Answer 1

it had flowers

Additional answer:

Dr. Martin Luther King actually had two coffins:

he was taken from Memphis to Atlanta in a half-couch solid bronze casket with ornate hardware (stationary handles with flower design). For his burial, this casket was exchanged for a more simple looking solid hardwood casket with swing bar metal handles and a hermetically sealing inner bronze or copper liner with a full length oval plate glass lid.