In my family, we consider the funeral to be a celebration of the decedent's life, and we dress accordingly. For example, one member loved his denim shirts. His widow gave one to each member of his close extended family, and that's what we wore. Another member loved his sports team; we all wore the team's red and white jerseys. A third loved the color purple and bling. We borrowed pieces of her bling and did her proud. For an acquaintance, I go with standard subdued colors, and honestly, it just feels wrong.