Grey, flat, knee length, warm boots. Please!

[HappyAsEyeAm]

I am on a mission to find some boots that are not black or brown, and I think grey would go with nearly everything I've got. I will be walking a lot in them, every day, so they need to be comfortable and flat (or with a small heel), and they have to be warm too, as I really feel the cold. Waterproof preferred.

Any pointers please? I am happy to look at Uggs, or anything along those lines, as I buy for comfort, primarily!

Thanks in advance.

I've been contemplating these as I need non-black boots but haven't seen them in real life yet.

www.clarks.co.uk/p/20356666

Clarks also have these

www.clarks.co.uk/p/20356666

www.clarks.co.uk/p/20353730

Oooh, I like those Meg Ruth boots, although they don't look very warm.
You could try going up a size, leaving room for thicker socks.

Oooh. I like them both, but I have wide feet, so only the first ones would be a possibility for me. I wonder if they are warm enough though.

My only other option I have seen so far is tall Uggs.

www.amazon.co.uk/WOMENS-RIDING-LADIES-CASUAL-BOOTS/dp/B00B8THJX8/ref=sr_1_52?ie=UTF8&qid=1379357780&sr=8-52&keywords=flat+grey+boots+women

Amazon have a selection.

I have wide feet too. I wonder how wide Clarks wide fit are. It varies so much.