My local paint shop will match any color based on the code and it will be in the form of a 1oz bottle. I have a 66 mustang, with their version of white/cream. It costs about $15 and requires no mixing after you buy it.
It's in a plastic 1oz bottle with brush. I cleaned the mustangs holes with wax and grease cleaner and touched up about 100 chips all over the car. Took a good while, but the car looked MUCH better.
This method accounts for the hole the chip makes, you fill the hole with paint using the small brush. You can then polish it out or wet sand the small area if needed.
After compounding, polishing and waxing a few time, you couldn't tell.
I've never had the cans mixed like that and have been painting for some 30 years. I'd go for those cans if the price was fair. Just watch a few videos, take your time, let it flow out without running, use a professional cleaner NOT ACETONE, but a professional bug and tar cleaner from a real shop and let the cleaner dry fully.