What age is the house and will you be going for a modern or traditional style indoors? What colour bricks or render do you have outside? Do you have a picture of the outside of the house. So many factors can affect the style and colour of new windows.

@Sonia it’s a new build so i dont have a photo i can upload. however this is probably closest to the style we are going for outside. Definitely going for agate grey windows outside as per this pic

Internally I’m aiming for something reasonably traditional. Fairlu neutral and pastels but with some bold black and brass accents. Modern country or modern farmhouse style seems to how it’s described when I search online. Such as the following

If the windows were aluminium and thin framed then that can suit black. But, as they're tradittional and thicker framed I would only have black on the doors as you have mentioned. The reason for this is we opted for the same inside and out to save money but in hindsight I wouldn't do it again. Having a window that is a colour (even if described as a neutral or grey) presents problems. For example if a room feels cool and slightly dingy and you need a warm colour on the walls, then the window can cause a clash. I would opt for a neutral off white (perhaps Pointing) and keep as many options open as possible.

Gorgeous house! I don’t think black would suit that country style. It can look fab on a more modern house. The sliders would be okay in black possibly? Agate Grey is a lovely shade, but I wonder if white would be better so that it doesn’t clash with the internal decor? I actually love brilliant white woodwork/windows like the pic below.