Why is my logo pixelating on the Empire Theme?

Hi -

I’ve got a perfectly clear logo from a designer to post. But once I post it in the logo section for Empire Theme, it comes up pixelated. My business coaches advise this is not good.

FYI, the logo space for Empire Theme is 250x100 and I requested a logo exactly that size. This may be the problem. I am not sure.

How do I post the logo so it looks like the file received from the designer and so that it is not pixelated?

Appreciate your help,

Dan