The phrase "value contrast" refers to the difference in lightness or darkness between different elements in a composition. It helps create depth, highlight important areas, and add visual interest. Full definition
Walden writes, «By selecting a yellow to violet complement for the field (the largest shape) of each painting, each painting or visual step starts out with high value contrasts and proceeds with inexact gradations found intuitively and experimentally in the act of painting.» (roberthenrycontemporary.com)
We are indebted to Paul Pretzel's paper on «Whales and Polar Bears» for this conception of the radical value contrast between the two cultures. (religion-online.org)
My wardrobe choices are more medium value contrast than yours (think grey and beige instead of black), with just a bit more color added, but you have directed me to many items which are now beloved and in my closet. (unefemme.net)