I have a Gray Sofa, and Blue and Gray Accent. What color accents should I use of wall paint…looked great in the store…Now not so sure… Walls are cream color, Entertainment set Dark wood and Glass tables. Please help

The fiberglass french doors have been factory primed, but they suggest using a primer made for use with polypropylene and finish with an exterior grade acrylic latex paint. 1) What type (brand)primer can I purchase that will also be mildew resistant? 2) Can this same primer be used on the