An angled ceiling creates a line that remains visible whatever colour you choose. In our Aberdeen shower room, custom basin furniture works around the slope, with a round illuminated mirror, pale panelled walls and vinyl flooring bringing the washing areas together.
We draw the mirror outline against the actual roof angle and check it from the place you will stand at the basin. A curved shape may sit comfortably within the available wall, but the glass still needs to provide a useful reflection. Consider the illuminated edge and the light needed for getting ready separately. That lets the shape, light and reflection work together. Include the height of the tap and any cabinet door in that view.
