Gray will be cold.

Greige (cross between gray and beige) won't be cold though. Love Revere Pewter. Always a greige winner!

Can't tell the colors of your counters or backsplash from your pictures. Not really keen on any of them.

Sampling colors is the best way, so good for you to take the time! With the exception of the bright aqua, it looks like you are wanting a cool neutral gray. At least, that is what you have sampled. Do you plan on changing out the tile or backsplash? Paint color is always a loaded question. :-)

Out of those colors, I like the bottom color best. It's fairly neutral, and not too light, but not too dark. A perfect medium, in my opinion. :)

There is no baclsplash so the color will be the same as the walls for now

Honestly, I am looking for a neutral color that has a light blue/turquoise tint to it. The top two colors are a result of me bringing home the sample cards I thought I'd like from the store and looking at them in my space...and the bottom two are "favorite" colors of designers for all spaces(comfort gray and sea salt by sherwin williams) that I tried after I wasn't happy with the top two. The middle is going to be my bedroom color, but I threw it up there too just to see. I am terrible at this! :)