Contrast is often the magical key ingredient to making your designs ‘pop’, which is a (sometimes frustrating) demand from many design clients.
In a very basic definition, contrast is the degree of difference between two elements of your design.
Some common forms of contrast are dark vs. light, thick vs. thin, large vs. small, etc.
It is a good idea to teach children contrast by drawing different pictures using the strength of the brush strokes.
Myungja Anna Koh