would you consider a barn board wall? across the back and id guess that same wall goes over the Jacuzzi?

i think silver grey barn board works really nicely with the grey-blue colour of the walls

it works nicely with white contemporary trim to create a rustic-modern look, and its got so many grey tones and texture going on it will tie into and highlight everything i see in the bathroom there

i think it would both highlight, but take attention away from the tile

No gray. How about bead board painted bright white?

You already have dull colors in your tile - don‘t add more.

Get some bright clear yellow or white towels and rugs. Maybe a picture or two with those colors.

In the photo it appears that the tile is a charcoal gray, but you said it is green? I realize that you said you do not like grey, but a light grey that is similar to what is in the tile, would make the grey in the tile more dominant in the room and tone down the green.

do something like this w/a large rug that covers most of the tile in front of the vanity

or something like this,,,,,but still find a rug

see if any of these pale blue/grays work

or do a natural wood vanity, creamy white wall paint and accessories

bring in lots of light(as in recessed light) ,,go w/black walls, bright white tile, countertop, natural wood

or these colors. vanity in the Shoji (it's a warm white) and Urbane for the wall

Did you know you can paint tiles? Paint them and do a stencil on the tiles like shown below.

CuttingEdgeStencils has the info, as does Google (how to paint ceramic bathroom floor tiles)

What kind of feeling do you want if you are soaking in the jacuzzi? Would burgundy or maroon Interest you? It might go well with your tile but dominate the room visually. Then I think you could keep your present countertop on the vanity, and maybe paint the vanity itself black and switch out the hardware to something very modern -- hard angles.

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If that is too cave-like for your taste, and you were hoping for more of a spa-feel, then I would think in terms of a pebble beach on a sunny day,, and look for light aquas and sea spray colors -- and maybe a vessel sink? If you don't have any natural light in the basement you might be able to recreate something like this with frosted glass lit from behind.

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Ok so my opinon. I don't think that the grey tile is actually that bad. I think that painting the walls a bright white would accent the tile but it would make it look less obvious don't know if that makes sense? When you have a mottled pattern on a tile when trying use "color" if it's not the right shade or tone it can make the tile stand out, when you don't try to match the floor becomes just a floor and the color doesn't really seem important. The Cabinet is already white so go with a darker charcoal colored counter top ( concrete or quartz concrete look) to balance with the floor. https://www.lowes.com/pd/allen-roth-Inverness-Quartz-Kitchen-Countertop-Sample/50128962 Then pop in over sized Black & White Photos or Canvases on the wall and a dark frame around the mirror https://www.mirrormate.com/all-frames/cherokee-montauk-driftwood.asp and you've got your Modern Bathroom. You can accessorize with any color you want. The most expensive thing here would be the counter top. And you can actually get some really nice Formica since it's not a main bathroom anyway.. https://www.homedepot.com/p/FORMICA-4-ft-x-8-ft-Laminate-Sheet-in-Blackened-Steel-with-Matte-Finish-089181258408000/306249664 

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You said you are replacing the counter, so I would look for a countertop color that harmonizes with the best color from the floor. Then since it's in the basement, I think you could have some fun with it. I would look for some wallpaper with a light colored background that incorporates a color from the floor and a few other brighter colors that you like. I'm sorry I don't have any specific suggestions to show you. I feel that too much dark color in a basement bathroom cuts down the light alive and makes it look gloomy.

I actually like the floor tile, but I'm sure that doesn't help you ;) I've seen a lot of tile I'd consider ugly and would have a really hard time working around, but yours seems neutral to me and would allow you to go in a lot of different directions design-wise. If it was my bathroom, I'd probably go with white walls and either a darker counter that coordinates with the floor color, or a pedestal or console sink and maybe a stand alone piece of furniture if you need storage (but maybe you don't if you don't use the basement bathroom often).

Do you like any of the inspiration pictures Beth posted?

Thank you all for taking the time to respond to my dilemma! You have each given me something to think about. I think I will start with painting the walls white, even though it wasn't originally my first thought, and look for a rug and try to pick up some colours from it. I will post pics when I make some progress.

You may want to also consider getting a frame for your mirror. It is a very inexpensive way to give your bathroom a more finished and updated look!

I would not do white! It would make your flooring look dirty. Looks like your shower and vanity are cream. I would go with a cream to go with those. Will compliment the flooring.

And I think the countertop is fine. Looks like it compliments the flooring. And I love the cat!

^HU, what am impressive job of painting the tiles! Kudos to you :)

The ugly component is the tile.

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Before you paint the walls make sure you have the right light. This is a basement bathroom so the color of the light from your fixtures can make a huge difference in the colors that you will see on the walls and in the flooring.

Check if you have 2700 k lighting or 4000 k lighting or 5000 k lighting.

Thanks for the tip, Jennifer. And HU, your tiles look amazing!

Once you get the lighting that makes the floors look as good as they can then it is time to pick a counter top and paint color.

There is less choice with counter top colors and it is more expensive and harder to change out than wall paint.

Bring samples home and look at them in your space and with your flooring. Bring home a bunch of different colors because it never looks the same in the store as it does in your home.

If you could also pick up a bunch of paint swatches and try to find something that looks like the green color in the flooring it may give us a better idea of tone. It doesn't appear green in the photo on my screen. It looks like taupe (Beige/Gray) and gray and your counter looks charcoal gray - more dark blue gray.

That is impressive HU-359594306!

Once you have lighting and counter material selected then move on to the walls.

I love white in really well lit rooms that are interesting . Too often they end up looking like someone primed the walls and forgot to paint.

Not sure a basement bathroom will ever have enough light to let white be the shining star.

I would paint the walls white being careful to choose the correct white and maybe make charcoal or black accents. If you really don’t like the tile you could paint it in any design you like or even put down a lino floor in a colour of your choice. It is really soft under the feet. Or use laminate wooden floor boards.

Still a few more things to do but I am much happier with it. A minor flood forced us to act this fall. Hard to tell in the picture but the rug (bought on Houzz, a bit too big, I know) really does go with the tileand ties in the vanity and towels. Still need to replace the hardware for the tub and towel bar. Upgrading the shower this winter. Thank you all so much for you advice and posts.