@Mamapolo2016 That's the idea behind the blending. Slight shifts from one wall to the next, or a tad lighter to bring out the molding, or just a tad darker to make outside corners float.
For inspiration, visit a well painted church or museum.
@Mamapolo2016 Yes, it's the image of different colors, side by side, each inspiring the other yet holding true to themselves. I call that blending. To thoroughly mix them together into one, I would call that "homogenizing" :)