It sounds to me like you aren't going to be happy with any ancillary wall interruptions that don't match the trim color. Therefore, the 2 choices are you go with eveything white, or you find a color that in which you can get your switch plates, outlet plates, t-stat trim, vent grills, etc. and then match your trim color to that. Naturally, what will happen down the line is you'll install something new that's not available in that color. To be forever matchable, white is the only way to go.

If you can paint the entire window on the inside, it can be any variation you want, because the inside will be consistent.

rdas, Have you thougt about lighting? In my kitchen the lighting effects the color of my paint. My cabinets are a shade or so warmer than the bright trim throughout the rest of my house. But, the lighting that comee in from the windows changes the color of the cabinets throughout the day. Slightly of course. And at night the glow from the undercab lighting and the accent lighting also has an effect. My paints appear so close they look like they match. Only I know because I ordered different paint colors. Can I see a difference up close? Not really and this may be because they are by the same paint manufacturer and truly just a shade appart. You will be in a different situation because my cabs are painted and yours are custom ordered. I can only imagine the stress you are under trying to match. I also have the factor of the The Tan Coat wall paint color draws the eye away from whites fighting with each other. Sorry there are pieces of trim missing in this pic. Still trying to finish the kitchen. I hope this can give you an idea that whatever you do choose will probably be closer than you realize. You have excellent taste and I know your kitchen will be amazing. ~boxerpups

I agree with applepieorder and RL Relocation as well. That whites do not always have to match totally. Secondly, I notice that you have window sills only (no other molding apparent on the windows. If you want to, you could paint just the sills as a diy project, but you know, I believe I agree with applepieorder that you don't HAVE to. I would enjoy your wood blinds like they are, and make that decision down the road.