P.S: The mantel is going to be longer going from end to end of fireplace

I voted for the stain - a light natural look. I think white would blend in too much with the surroundings and not make it as much of a statement piece. If you wanted to go with a more contemporary look I'd say paint black.

Maybe the mantel should match your wood floor if that is what you have.

" One option is to stain the mantel and the floating shelves with same color "

Cedar mantel stained will not match the builtins. I would do as above and match the floor stain color to the mantel

I am not sure if matching the mantel with floor stain is an option

You can purchase mantels on Amazon. Your room seems a bit elegant for something as rustic as cedar.

Can you please suggest something that would look good in our living room. Thanks much!!