This poster completely hits the nail on the head when it comes to contrast. Not only are the black and white colors contrasting but the use of positive and negative space displays the information in a clear manner.
30 Brilliant Branding Identity Design examples for your inspiration
The golden arches of McDonalds is a perfect example of how simple logos are sometimes the most powerful and effective when trying to attract attention and business. Simple logos can become more memorable quicker since it's short, sweet and to the point.