Blue shirts can be worn with ties in dark blue, gray, rouge, yellow and brick. You can choose a blue tie, so you must make three different "blues" present a beautiful layering, and it is best to let people see their own blues in the distance, but they match each other. Can be paired with "navy blue shirt with purple-blue tie to deepen blue suit" or "light blue shirt with positive blue tie to deepen gray-blue suit" as follows. It is a safe choice to add a neutral tie or suit to the blue shirt with neutral items such as black, gray and white. As long as it is properly matched, it can give people a feeling of maturity and stability. Just grasp that "shirts must be lighter than suits".