No downward pressure when using colored pencils is the key to successful coloring. When the pencil point just barely touches paper, it leaves a light trace of color and wax. What it doesn’t leave is ridges in the paper caused by the point of the pencil that are difficult to color evenly.
Starting light and gradually going dark makes a more evenly colored shape. This is true when using just one color or when layering colors.
The merest whisper of color is also essential in shading and transitioning from one color to another.
It’s so easy and may not look like much at the beginning, but it is the foundation of good coloring. Remember to Slow Down & Enjoy Coloring!