I don't have any suggestions, but here is a link to a blog post by a professional colorist (or colourist) about using light colors in rooms with little or no natural light. Here is a link that might be useful: Colour Me Happy Link

Thanks for the suggestions! I would love to paint the vanity eventually! However I live with someone who is against that option *insert eye roll* and anything other than painting the walls as this won't be our forever home

I think I have that same 10” hex from Spain, except mine is the charcoal color (looks black). Just wanted to say I love it, and i think the grey version looks good with your vanity. Also, if you’re pricing marble tile it’s worth taking a look at www.thebuilderdepot.com. Our master bath has a ton of Carrara Venato marble tile- 4x12 on the floor, herringbone mosaic on the shower floor and 6x12 on shower walls, and we sourced all of our tile from them. The prices are amazing compared to the tile store where we bought the rest of our tile, and the marble quality is great.

Do you have the vanity already? Do you know the paint colour on it or can you find a match close to it with a paint deck? The easiest thing is to follow the paint colour suggestions that the paint companies offer on their websites. For example. The vanity looks a little like Benjamin Moore North Sea CC-932. The suggested coordinating colours are: BM Blue Heather - 1620 BM - Weimaraner - AF-155 BM - Meadow Mist - 936 Based on the BM coordinating colours, I think the SW Rain might be a really nice choice. But the best thing is to get some samples and try it in the space.