Oooh, I love your colour complements here, Jenni! Fabulous! On my screen this looks like a true fire engine red. Maybe a bit on the blue side of red but pretty neutral red, really -- could be worn by someone with a warm or cool complexion.
So is your question, do we collect items over a long period time in a favourite colour to wear together in outfits?
In my case, the answer is absolutely!
I don't necessarily do it on purpose. But because my favouite accent colours stay pretty constant and I sometimes have trouble finding items in those colours, I definitely consider, when making a new purchase, whether it will work with my others in the same colour.
A recent example. I bought a dark cranberry red sweater in... maybe 2016? Almost a decade ago. It's still going strong, despite being a knit. Very good quality and worth every penny.
Recently I added a pair of trousers and a vest in the exact same cranberry.
I also own a number of tonally related pieces that I can mix and match with these pieces. (See below). And would gladly add more. This is a colour that works very well for me. These are not all exact matches in real life, but awfully close, or containing at least small smatterings of a match (in the pattern).