I started to second guess my posting and whether that bluish color is actually Silver Sage -- I am so sorry, I know how confusing this can be and I don't mean to add to the confusion! It could actually be Benjamin Moore Cashmire Grey. Whatever the color is, on this dark, dreary, rainy morning - it now looks more green. This is why it is always a good idea to get samples and put up on your own walls so you can see at different times of the day. All my samples and 1000+ paint swatches went in the trash after reno - part of the "cleaning" out process. I can't help you with those other colors and don't want to guess!!! Trust yourself, you have beautiful colors in the other rooms!!!

would manchester tan be a good choice

Choose a coordinate from the siding, but also take the roof into consideration. I’m going to suggest B.M. Dior Gray for the garage door and two larger sconces for either side of it. It is a good gray with lilac. I love your house. Fun and different.

Natural Cream and Maritime White are so similar I wonder if you'd be able to tell that they're two different colors. They both belong to the Yellow hue family. When it comes to the theory that colors have undertones - especially paint colors - you should know that everyone is making that up as they go. Colors don't *have* undertones. It's not a fact. Undertones are just someone's subjective opinion of how a color looks under unspecified light sources in some random context. Which means no one can get a color's undertone wrong because it's however it actually looks in their opinion. When we compare the factual color attributes (think of it as color DNA) Natural Cream and Maritime White are very similar. You don't have to understand the numbers in the table in order to see just how similar they are. Basically the only difference is Value/LRV which is why I wonder if you'd be able to tell they're two different colors in two different room's inherent lighting.