Thriller - Costumes

My group and I decided that for a thriller our characters would need dark clothes to go with the mysterious, dark theme associated with thrillers. An ideal costume for both the dead body and the antagonist who discovers the dead body would be completely black clothing, for example:

This is ideal as thrillers need to be mysterious and dark to create suspense and tension and if our characters were wearing bright fluorescent clothing it would not be suitable for our film what so ever.