Pretty bathroom & love the tile! That window appears to be frosted so providing privacy isn’t a requirement of shade, correct? You said you want simple & I agree - the tiled wall is the star. I don’t think the Zebra shades qualify as simple & those strong horizontal stripes against the vertically placed tiles would really be a problem for me - very distracting. I’d be hanging a shade inside mount too - no drilling into tiles for me. For a clean & simple look I’d use a simple pleated shade color matched to window trim & inside mounted. If you will want light blocking for some of the window, consider a bottom up top down shade. That kind of shade will have a skinny cord showing against the window when shade is in top down position but it’s not a visual problem just something to be aware of.

Your bathroom is beautiful. Those blinds will look pretty terrible in there against your tile. And how would you reach beyond the tub to raise and lower them? Are you looking for privacy or light control? For privacy, add frosted film to the window. For light control, don't you usually want a brightly lit bathroom?

@kendrah, I just want something to dress it up a bit because I've never loved the frosted look (put up the film years ago prior to recent remodel). But maybe I'm asking too much and it's fine as is. The window faces neighbors red brick wall.

Gotcha. If you are just looking to cover the window for aesthetic purposes and keep a curtain down or closed all the time, I'd get a simple semi-sheer roller blind like in the first pic below or a simple double rod curtain in white like the second pic.

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Since privacy is not an issue I would leave it bare and enjoy the natural light .