In the summer, I choose to wear a blue suit for work because it is warmer and therefore easier to work in. If you are looking to dress up in a suit or casual dress for a holiday party, you may want to consult with your stylist.
However, if you are planning to wear a suit or casual dress to more formal events or for a job interview, you will want to consider something like a dark blue or black suit with a white shirt and tie. This is because a dark blue or black suit will bring out a more serious side to the wearer.
Another type of blue suit is the white shirt and tie. This is a more casual look that will also work for casual events or for casual dress for a job interview. You can also wear a suit shirt and tie for any job interview that is casual.
For more formal events, you will most likely want a gray suit or white shirt and tie. A gray suit is a more casual look and it still has the same suit jacket and pants as a white shirt and tie. A suit shirt and tie is a more formal look.