"To contrast the shades" means to compare or display the differences between different shades or colors.
Sentences with «to contrast the shades»
With grey walls featuring throughout the house, bright accessories in contrasting shades like these vibrant yellow chairs brings colour into the space. (idealhome.co.uk)
Choose two contrasting shades of the same colour on walls for a dramatic effect in your living room. (idealhome.co.uk)
Choosing contrasting shades helps define zones in a large open - plan kitchen - diner. (idealhome.co.uk)