Why anthracite took over
Grey aluminium and grey foiled uPVC windows became the default specification on new builds and replacement windows in the early 2010s, and almost all of them are RAL 7016. A front door in the same reference is the only one that will match rather than nearly match, and nearly matching is worse than contrasting.
It also happens to be a genuinely good colour: dark enough to look deliberate, neutral enough not to date, and it hides road film far better than white or cream.
