My siding is a light tan with white trim. What color can I paint my exterior concrete front porch floor and steps?

I removed every thing in my bathroom all the way down to the wall studs. I replaced the drywall. I primed the new drywall with Kilz and painted the wall a pale yellow. Now over a period of time I noticed a brown film running down the wall. What could

I have an old house that has the Salmon brick color. Right now all the trim, door, garage door, shutters are white. I want to change the color but do not know what color matches Salmon. My garage door is white and I do not want to do anything with