In today's posting, I dropped down the percentage of space that the complementary colors of green, yellow/green, and a red/orange tint occupy. Each of the colors occupies approximately the same percentages with green being slightly dominant. There is also the contrast of the strong color areas to the light color shapes and the black. The light areas are the most dominant in the piece.
Contrast of size and shape is also important. If everything is the same shape or just one shape, there will be too much harmony and the viewer will lose interest because nothing is standing out as being more important than something else. It is referred to as hierarchy in each of the elements of design. So one color, one line, one shape, one type of texture, one value, and one direction needs to dominate to create harmony.
However, contrasts need to be present as well. That's why I included straight and ragged edges, very light and very dark areas (values will sneak up on you!), very intense and strong color contrasted with aged and old book pages, surface contrast between opacity, transparency, and translucency. Design is the visual vocabulary of art so it really is important to continue adding more knowledge in this area to your process. And that is precisely why I am experimenting with color percentages. Each small piece teaches me something else about design. And there you have it...just a few more things to think about.