Nordic buildings often have have painted brickwork ? Maybe that's a look you could consider ?!

Do you have a picture? Just that different colours suit different periods and styles. I find a soft greeny grey looks good with period red brick, as below.

I think anthracite grey will be absolutely perfect. It will match the roof tiles. I once updated the rear windows of a red brick Edwardian house with anthracite grey powder coated new windows. A dark grey planter with some greenery either side of the front door would lift it. Bay trees or something similar.

Composite frames come in various colours so you’re definitely not restricted to only black or white. Can you please post some photos of your house front and back.