Certain qualities make logos more memorable and distinguishable, including simplicity, proportionality, and using a limited color palette. Effective logos are clean and uncluttered while still being proportional in size. Most recognized logos use one to three colors that contrast well. The design process begins with sketches without technology to focus ideas, then moves to black and white designs before adding color. Logos should follow principles of being simple, distinctive within their industry, and appropriately using font, color and shape associations.