Using the Colors in Right Percentage
One good idea is that you must have 75% of the kitchen painted in the main color and 25% of it in its shade to neutralize the effect while you want to have a lively effect.
In case you are creating a calming effect, you can have the two shades in equal percentage. This way you can use same combination to create different effects. Like a combo of magenta and off white, violet spanning 75% of the kitchen and off-white spanning the rest will give a flashy look to the area.