We have three sets of windows to dress. The single in Connor's Room which I imagine as panels on rings to each side of the shutters is the first to discuss. I think that a deep green that is more yellow than blue would be handsome with the Stampede 979 wall color. I wish the colors showed better on the photos but such is technology.
For Caroline's room, we have a full wall to do behind the bed that will be on a traverse rod hung just below the crown moulding. There are two ways to go there. One is a soft green that works well with the Bath wallpaper and a soft blue that also works. We have another choice to make in her room. We can go with the Coastal Fog color (as in John's office) or we can do it a little lighter version of that same Fog color. Or we can do to a "color" but that decreases the "punch" of the drapery accent wall. We could do a creamy white to match the trim but that is less attractive with her mirrored chest. Each of these colors is a bit softer than the photo shows. For the draperies a simple and full pinch pleat would be my recommendation.
For the master bath we should use a faux Roman Shade as a valance on the top of each glass block window. Again, installing it almost at the crown moulding and having it come just to the bottom side of the upper jamb on the window. Here is an example below.
There are two good fabric choices that keep things lux and monochromatic. One is a silver and the other is a pewter color. Thoughts?
Your feedback on your valance choices then tells me which way to go with the cabinetry color in your bathroom. We would go mid-tone with the silver and a bit darker on the pewter but still lighter than the Lagos Caesarstsone counter top.