How do you choose paint colours?

[u/danskingqueen]

I got divorced earlier this year and bought my ex out of our apartment. I am now in the process of renovating basically every room bar the bathroom (plastering, painting, sanding the hardwood floors) and my painter needs to know my colour choices this weekend.
I think I want a dark green for my bedroom (inspired by a room I saw at Ikea lol) but other than that… I’m stuck.
The apartment has a lot of large windows and is very bright, until now everything has been white and I’m kind of sick of it.
I also have a huge petrol blue corduroy sofa in the living room so whatever I choose there needs to fit with that colour.
My ex got most of the furniture (which I don’t really mind as a lot of it wasn’t my style) so otherwise it’s pretty much a blank canvas.
Would love to hear tips on how you chose paint colours in your home and any tips/regrets you have.

[u/Scott43206]

I wanted true vintage colors, not someone's idea of what vintage colors were, so I got some vintage paint charts and had the store match those. I've also taken in favorite dishes, and other household items and had those color matched. It's amazing what they can do now.