with the caramel floor and darker cabinetry I would try to meld the tones. there are things like mother of pearl [also gives a little sheen], maybe hex shape for interest and choose a multi tonal selection....some sort of glass in an amber shade. Your home looks slightly formal.....I would look at mother of pearl...see what shapes /configurations it come in these days......it could be the right detail /interest as everything looks a bit basic and plain so far....and no window here. A porcelain tile would marry the browns, and is a beautiful tile but you are staying away from contrast, so you say. The brown on brown is something to work with and I like the potential to play it up.

Hello C Brown, while we don't have an example of a space identical to yours we can recommend something similar to Susan Jablon Milk Glass Tiles. See them installed with Torquay and darker toned cabinets HERE.