The best long term solution, that would add value, would be to install the same type of hardwood for continuity. If it is site finished wood, then it is pretty easy for a good wood installer/re-finisher to install and do a pretty good job of matching the old floor. If you wanted to change the stain of all the wood floor in the house, then that would also be a good time to sand down everything, new and old, and re-stain in a new color.

Don't use anything that is a fake wood-look and/or in a gray color!

Yes , it would look bad. Install the same wood you already have, which looks to be a site finished oak. This means you will have to have it all refinished together.

I will not tell you if different wood floors will look good or bad, but I will tell you matching the existing wood floor will look good.

Thanks everyone! We’ve decided we will just match with the existing wood floor even though it’s not my favorite choice/style of wood flooring. Maybe we will change the finish/stain of it And I will like it more!

Danielle I think its the solid choice.