I can't tell you if it would be too dark. I've never used it.
I do have this picture of it.

I had bar harbor beige in my north facing living room and entry several years ago--sorry, no picture. I did not find it too dark. I loved it and received many positive comments on it. Did you try google images? The picture above is pretty accurate, though.

Thanks! Yeah I did google pictures. There weren't too many.

Bar Harbor has a LRV of 53 - that means it's a mid-value color. Fifty is the average guideline for residential interiors.

Used as an 'all over' paint color, you're probably not going to feel like it is too dark or too light in any one given room because it's right there in the mid-value range.

It also has a lovely nuance to it which means that in addition to being a mid-value color, it is nicely toned as well. Not too clear and vivid, yet not grayed down to the point that it's muddy.

Here's more info about LRV and Nuance:

How to Use LRV

Nuance of Color