Representing the subtle differences in brightness and color, the contrast is the most important factor for making visual objects stand out from the background. Its mark on web design is quite significant as the most successful websites display a delicate, well-chosen balance making them pop out in the eyes of their visitors. Online color wheels do wonders when inspiration in this department is scarce.
Exactly like the term, vibrancy stands for a way a particular color resonates in the eyes of the viewer. Each color is supposed to bring specific moods to the surface. While brighter, warmer colors favor increased energy and alertness, colder colors tend to relax the audience. These tricks are widely used by web designers everywhere to enhance and match user experience to the content of the site.
This notion speaks of the relationship between colors and of the way they merge, in order to create a pleasant environment for the eyes of the audience. When looking at the color wheel, they can be easily spotted as being opposites. A good color complementation can make or break any visual creation and requires good taste and extended experience.