There are a couple of answers to the question above. The first is that you can pretty much wear any color tie with a blue suit. A blue suit is one of the most versatile and “neutral” garments in a man’s closet. And therefore, your choice of tie color can make your suit look and feel pretty much any way you want.
(N.B. For argument’s sake, let’s assume by ‘blue’, we’re talking about navy blue or a moderate royal blue color.)
And the second answer is pretty much just as unsatisfying as the first: it depends.
Because, of course, the tie you choose should complement the situation and occasion. You wouldn’t wear a loud paisley tie to a funeral, for example.
Here’s some blue suit/tie inspiration that will have you covered no matter where you’re going, what you’re doing, or how you’re feeling.