The principles of design are techniques that artists use with the elements of art to create effective compositions. There are 11 principles: balance, contrast, emphasis, variety, unity, proportion, rhythm, movement, pattern, and repetition. Balance refers to visual equilibrium, contrast uses differences to draw attention, and emphasis creates a focal point. Variety increases interest, while unity achieves visual wholeness. Proportion deals with size relationships and rhythm implies motion. Pattern and repetition involve duplicating elements to create decoration.