My yellow ones are the actual light housings not just the reflectors, I thought maybe you could try to make them red as I do not need them.

To get them out you just need a library/credit card. Slide them behind the light and it pops them right out. If they are being stubborn use a really small screw driver wrapped in a soft cloth to pry them out. It does not take much to get them out. They actually come out so easy you will be surprised they stay in there on there own.