I have a lot of sunflowers in my yard and since it is the fall the leaves are all turning a great yellow color. The colors are all natural. I captured yellows and yellow greens. The colors are analogous because the yellows are close to the green on the color wheel, but also the first picture is contrasting colors because of the dark background and warm yellow and green. I focused all my pictures on the yellow and made everything else unfocused to make the yellow the yellow the main focal point.