"The colour wheel diagrams show how to select these combinations for your graphic products: complementary colours clash - like red and green, for example, so are great for edgy, loud, in-your-face graphics; contrasting colours like purple and orange add drama and contrast; while harmonious colours (sometimes also called analogous colours) like blue and green create a serene, harmonious and peaceful mood."
Colours and contrast
"The colour wheel diagrams show how to select these combinations for your graphic products: complementary colours clash - like red and green, for example, so are great for edgy, loud, in-your-face graphics; contrasting colours like purple and orange add drama and contrast; while harmonious colours (sometimes also called analogous colours) like blue and green create a serene, harmonious and peaceful mood."