I have a white one a neighbour gave me, plus a white one I got free with an order. I hate to say it, but I am going to replace them with something with colour. Too many years of snow in Ontario have made me dislike white.
My living room is kinda dark (aparently the apartment people didn't think a living room light was necessary) so the white stands out good. But during the day I open the balcony door blinds, so that let's in lots of light!
The neighbour who gave me the white one [it was out of bloom] bought it for the same reason. She wanted it to stand out in a dark room. Some people love white. I think a yellow one would also stand out and they are so sunny!