Another great DIY project. Paint square canvases turquoise; glue brightly coloured glass rocks or marbles on the edges. Purchase some wood cut out pieces, paint them bright colors and then glue them onto the canvas. DIY Art.
TLC Home Bathroom Design Idea: Low-Key Luxury. This reminds me a little of your bath--the color, the vintage tub, and the white flowing curtains behind the tub. You wouldn't have to paint the tub--yours is fine in white, but you can see how you could use art work etc. to give a bold color like that a more vintage feel.