The Auto Pick Color option
Finally, you have noticed that there is also a box called Auto pick color.
This option will save a great deal of time as it allows you, when checked, to pick a color when you click and to place it when you release the button. Combined with a Light table which only displays the previous frame, you may pick the color from the previous frame and place it in your current frame, with a simple click for colors who are in the zone, or with a drag and drop click for the others.
You can try this function by loading the Running Kid project which is shown below: