You might get more responses if you post this in the Home Decorating forum.

You don't have to use "power" to wash a brick house. A spray of water with something like Jomax will not harm the brick or the mortar and will remove the surface grime. You can scrub the individual bricks with watered down muriatic acid to remove the paint that is on them but do this by hand and only on those bricks. I have BM Linem on the trim in our library and the undertone is decidedly yellow, which sounds as though it would go nicely with the Rockport Grey with brown undertones. However, the blue/black would be of concern and you might consider a very very dark brown (almost black) instead. Agree with everybody else about painting the garage door the siding color. However, that garage door is very "ageing modern" looking and I would think to replace it at some point with a more traditional looking carriage door. Finally, Would not use a different white trim with the shingles when you use Linen elsewhere/ on the front. Your house might end up looking like separate buildings depending upon what side one views. Love your home, especially the entrance! Please post your changes as they're made!

Color choice is very personal, so you might not like my choices. I prefer some contrast, so that trim and the door stand out from the siding, but I've kept to a conservative mix. The colors are primarily tones of yellow, green and red. Below are four exterior color combinations from Sherwin-Williams using their color visualizer. I placed the particular color names for each variation on the garage doors; from top to bottom they are for siding, trim, and accent. Personally, I would replace your shutters (too small for the windows) with trim. In that case the accent color would be only for your door. I would paint the brick the same color as the siding, because I think the focus should be on the columns and the front door.

I would say either Driftwood, Estate Gray or Onyx Black based on your brick color, although it's hard to tell the colors in the brick from your photo. The roof color you choose would impact the siding and shutter colors. When you do the shutters I would not reinstall them on the double windows under the porch. If you're interested in seeing some virtual makeovers on your home, check my web site, Creative Visual Concepts. I could show you how different combinations would work together.