That style of dress is called "White Tie" and is the most formal of traditional evening wear styles.
Here's a quick link on it What is the difference between black tie and white tie events? | SuitUpp
Orchestra conductors dress with a quite interesting and not so common idea of formal wear.
some examples here, especially no. 4:
what is this special blazer?
and how about the shirt collar, showing the usually hidden tail of the bowtie?
I don't want to ask colleagues because they are usually lack style. I know think of moving from a usual suit to one of these..
would love some helpful ideas.