Remember thrusting your hand into a big pail of mixed-up, broken crayons (or gently reaching for your box of perfectly ordered, mint-condition crayons), then leafing through your construction paper to find the perfect hue to go with your chosen sticks of pigmented wax? Or, did you hunt for the perfect piece of construction paper first, then search for the ideal crayons to go with the paper? No matter how tidy you kept your supplies or in what order you chose them, even at a young age we searched for correct color combinations. “Correct” was something different to each of us, but it often meant finding the right contrast between the background (construction paper) and the foreground (crayons) so our work would stand out among our classmates’ masterpieces.

https://alistapart.com/article/contrast-is-king/