I bought an old farmhouse that has suffered significant neglect and abuse. While other repairs have been costly, like re-plumbing the entire house they are for the most part invisible. I have been having problems with repainting the interior. I am trying to repaint the interior and have problems with yellowing of the paint as it dries. I wash and repair the walls before I paint, but when I do the color does not come out as expected. I have applied 3 coats of brilliant white paint to the dining room and it comes out yellowish brown and splotchy. How can I prevent the paint from turning yellow as it dries? I know the other rooms are going to have the same problem. Also how can I paint over paneling, that apparently was greyish but is now dark brown?
As noted above, I do "clean" the walls, and the paint does stick, and the color looks great when the paint is still wet, it just comes out the wrong color when it dries.
There is a built in china cabinet in the dining room as well as broad baseboards and crown molding. I plan to use a shocking high contrast color like electric blue for the trim, I don't follow trends as to what is "in", if I was to do that I would be changing every couple of years.

dont know what country your in but in England we have something called 'stain-block' that you just slosh on before applying the new paint.

its normally used for covering stains caused by damp, but works pretty well on most things