For a poster, there are two basic examples given in the poster examples . Effective figures are the key to a successful presentation. Effectiveness comes in a variety of forms. Sometimes scientists go overboard with colors and slides, as they discover the many intricacies of the their computer programs. Keep your presentations simple, each figure with a legend and a caption.
Colors can have positive and negative impact.
However, do not let us constrict your visual artistry, because I have seen some nice multi-color presentations. For presentations, part of your visual impact is you, how you dress and present yourself. Keep this in mind as you prepare for the conference. Articulating your ideas verbally is a key for success in any field and any career that you chose. This is perhaps one of the most difficult aspects of presenting at a national conference.