Hi Selena, Would love to see a pic!

The lighter-- lime green towel would work. I would get a glass soap dispenser and, really, any beautiful piece of glass would work well for a toothbrush holder. You're in India, so you don't want to pay for international shipping, but here's an idea-- take a look at these cobalt blue dispensers on Etsy (and this is just one example-- they're all over the place): http://www.etsy.com/listing/116043015/cobalt-blue-glass-pint-jar-soap?ref=sr_gallery_25&ga_search_query=+glass+soap+dispenser&ga_order=most_relevant&ga_view_type=gallery&ga_ship_to=US&ga_search_type=all I'm not sure the soap dispenser and toothbrush holder have to match anything in particular. I just think beautiful glass is beautiful glass. I mean, take a look at this depression glass pitcher, for instance. If the right size, I think something like that would be unexpected and amazing sitting against that beautiful grey tile. This particular one is rather expensive, but you can find ones less than this and along the same lines. http://www.etsy.com/listing/104529409/vintage-pink-depression-glass-pitcher?ref=sr_gallery_5&ga_search_query=depression+glass+pitcher&ga_view_type=gallery&ga_ship_to=US&ga_search_type=all When it doesn't match, it will seem simply like something lovely (and functional) you've had on hand-- maybe in your family-- for a long time. I feel quite sure you can find beautiful glass in India.

I wouldn't put any water under there because of potential mould issues (in fact, there looks like there's a bit of mould already -- is there?). You could tile the bottom of it and put a strip of LED lights under the glass. What did you have in mind when you initially thought of the idea?

Hire a local designer who can actually see your space and where the plumbing connects are located. Generic layouts will never help with your specific space.