A good example of consistency is choosing a specific color palette to use in marketing materials to create a standard, recognizable look. Another example of consistency in graphic design is using the same font and tone to achieve a uniform design across a website.
One definition of "consistency" is harmony and compatibility among parts of something, such as the colors used in a home. "Consistency" is also used as a scientific term to describe the degree of firmness of a material, such as cream. Researchers look for internal consistency when determining whether several questions on a survey designed to measure the same item produce similar results.