With some color in the sky the appearance of the whole picture really changes. Now that the sky has more depth, the picture has some real perspective. Now the dark color right around Mt. Fuji is added. This will bring the mountain into sharp focus and draw attention to it.
Mt. Fuji stands out much more sharply against the sky now.
Now it's time to add color to the waves. Two different shades of blue are used to give the water more contrast and depth.