Research and Planning: Codes and Conventions of a Film Poster

Looking at few horror film posters I have noticed the common conventions of horror so for my own I will have:

• use dark colours which is more likely to be black than any other colours
• a film title being a striking light colour in thin font
  
• extra text being in white or grey e.g. catchy phrase to the film
  
• the crew credits in white small font at the bottom
• one big picture with an old film reel or fine paint effect.