Is this suit an acceptable blue?

I think you should go darker

Generally, I do see darker suits at interviews, but I think this looks nice and would be fine in most professional contexts outside of interviews. Personally, I wouldn’t care if someone showed up to interview in this, but I can’t speak for everyone.

Looks fine to me, but safest bet is one shade darker

Agree with others above, if it's your entry / first suit ever, I would personally recommend going with something darker.

And over time, you can acquire different colors like dark / heather gray to lighter shades of blue, such as the above.

But overall, it's a nice looking suit, I wouldn't hold it against you if I saw you wearing that.

That is an acceptable suit. It would be a little out of place in the most formal type of settings (ie - in a boardroom) but if that is what you go with most people won’t be like “the hell is that?”

I personally would like a darker blue unless you already have one. Something more like below. It isn’t that much different. This difference doesn’t really matter. But this is something I would choose before the one you are looking at if this is my first blue suit

It's fine, and I don't think anyone would dock you in an interview, but go darker if it is going to be your only suit.