I think you can ask the builder to make this right. Surely he must know that no one would want the only source of light in a room to have amber glass. Get antiqued brass if you must. It is making a comeback. Did you take any pictures of the fixtures? I'd like to see one.

Don't be sad, this is so fixable. Emmarene is right, tell the builder about it, and expect him to make it right. If this is a builder of any size, you will get a satisfaction questionnaire after you move in, where you will be able to rate the builder. He will want you to answer that you are satisfied. If he won't make it right, then do what Beverly suggests, it will not cost much. This is a time for great joy. Don't let this little fly in the ointment spoil the joy of your beautiful new house. I love that shower!!

Bronze fixtures most OFTEN come with very off white or amber glass shades. A simple trip to a local lighting store with shade in hand for sizing....will fix your problem, ( you may need to special order) as will a check of the bulbs he used within, which may be the most basic green toned builder variety.

That said, in virtually no room, even a foyer, do designers regard ceiling lights as the ONLY light source ( powder rooms excepted perhaps) . Table lamps, standing lamps, recessed lighting, sconces, accent lighting.....all come into play. Fix the shade issue and know that the most attractive lighting in any scenario comes from a mix of levels and sources. .......my bet is you own some or many of those right now: ) and can relax.

I always tell my clients to take the crappy builder lights and change them out themselves after they are in the space the builder just upcharges and really makes no attempt to design your lighting t fixtures that is your responsibility and you should have at least been given the opportunity to see them before install. You probably paid a premium price for a very run of the mill fixture, I agree bronze fixtures almost always come with cream or amber shades as white is too stark. The type of light bulb will have very little effect as long as the shades are amber as for the room with the tile that room is going to have a yellow cast no matter what you do as the tile will provide that color always.