When one colors, all negative emotions should wear off. Once you empty your brain and heart of those negative feelings that make you stressed out, there should be more room for positivity. Since you are positive and filled with good energy after coloring, there must be no difficulty in continuing your job with full productivity.
So, what is it that makes fairy coloring such a worthwhile pursuit? This is my opinion, obviously, but here goes. When a child, or an adult faces a crisp white coloring page it is the beginning of an adventure. It gives a little feeling of elation and wonder. It might give you a little feeling of fear or confusion. Trust me, if you relax and realize that you are doing this "just for the fun of it". This cliche is true. Any art is really for the fun of it. For the exploration and adventure.
Studies have shows that anxiety levels dropped in adults that colored. They did note that simple doodling had no affect on anxiety. The focus on coloring and switching off the brain allows that blocking of anxiety in the moment. Coloring does not have a need for complicated thought processes and like listening to calming music, you are able to get within yourself, isolated from external anxiety, commotion, and distractions.