Hi all! So we just had our floors refinished and arrived home to our kitchen essentially looking as if it is two different wood finishes. We called the guy that completed this project for us, and he told us that this area must have been repaired at some point and was newer wood, so there is no possible way to match it. He used Loba impact oil (chalk finish) on the floors. Prior to getting our floors refinished, we never even noticed a difference in this area. We were getting them refinished due to there being some dark spots in guest bedroom areas that were all able to be covered with rugs. Now we are being told that we can just put a rug over this new eye sore. Any advice would be much appreciated. Thanks so much!

Here is pic: https://imgur.com/a/rsMoUGH

It looks like you have two different species of oak in your floor. There is Red oak, on the right side of the picture, and White oak on the left side. When someone goes to a wood store and asks for "oak" now, they will usually get served Red oak. In times past, White oak was the preferred floor material. The best way for these two species to match would be to use a pigmented dark color like Dark Walnut. The harder White oak will not absorb as much stain as the Red oak, so the floor will look better, although much darker.
Sorry you have inherited this problem with you home. The rug idea is the most practical. This color differential can also happen when matching two different grades of flooring. A clear grade will have more heartwood and a #1 common floor will have more sapwood. The heartwood is darker and sapwood is a lighter color. Heartwood comes from the center of the tree and sapwood is from the edge, closer to the bark.