In dream interpretation, the color blue represents calmness. If you dream of a blue snake, it suggests that you are being evaluated as a dependable and calm person by those around you. Your calmness is particularly sharp, and your judgment is heightened. You will be able to easily make decisions on matters that you previously had difficulty deciding on. One thing to be cautious about is that being too clear-headed and overly calm may cause others to perceive you as cold, so be careful.