You're talking an outdoor space here, not an indoor one. Wood would never be on the list unless you did something like tongue and groove ipe decking. The only suitable floors for a non temperature and humidity controlled space would be porcelain tile, indoor-outdoor carpet, concrete, or possibly vinyl, but the vinyl would depend on the amount of UV the space gets. UV will kill vinyl, or any finish meant for interior use.

Is the concrete as pitted as it appears, or are those voids filled on installation? If there are actual pits in the surface I would not use it in a bathroom where accidents with biological waste can happen. Yes, a young, healthy adult (who does not drink to excess and so never has to bow to the porcelain god) should never make a mess, but what about someone who is ill, or infirm and has trouble with control? Or youngsters learning to stand and pee? You don't want any surface that can hold accidental spills on a bathroom floor. Heck, you cannot even be sure the toilet will never back up! Can you imagine trying to get that out of little holes in the flooring?

Emerald, oak, and white can work well together. The bisque color may work. I would look at matching the tile to the tub if you can't change the tub. It would help to see photos.

Help! The attached photo is my vanity cabinet (Kraftmaid Greyloft) and my quartz countertops (French Lace). I am struggling with the best flooring for the bathroom that will look good with this combo. I I’m worried gray could be too much and white could also be too much as my stand up shower will have white subway tile walls. Open to wood looking tile as well... but hard envisioning it. Give me suggestions!!! Links/photos appreciated!