Hey Laura!
I looked into to dark wood look tile as well. We decided on engineered hardwood in the end. Here is Porcelanosa Woodtec.
Very nice and a bit on the pricey side. There is a showroom in the San Jose area.
http://www.discoverwoodtec.com/

Here's a couple photos that I have seen online.

[traditional kitchen design[(https://www.houzz.com/photos/traditional-kitchen-ideas-phbr1-bp~t_709~s_2107) by dc metro design-build Synergy Design & Construction, Inc.

[contemporary bathroom design[(https://www.houzz.com/photos/contemporary-bathroom-ideas-phbr1-bp~t_712~s_2103) by blog.designpublic.com