The relationship between the elements in a design is key to creating harmony. The design should not be jarring, but rather flow together. When you’re designing, it’s important to make sure that you’re choosing colors and shapes that work well with each other and match the intended purpose of your design.
Everything should complement each Element
If one element in your design has too much contrast with its surroundings, then the viewer will most likely be distracted by it.
If you notice this happening, move on and find another color with less contrast for your next element. This principle helps create balance when designing.
Uniformity in Your Design
This principle also helps to create harmony between different parts of a design or between different designs. For example, if you have two different logos, they should look similar enough so that they don’t feel like they’re from two different businesses; they should look like they belong together without feeling too close or too far apart from each other.