color chips would be the "standard on your desk"
as far as "don't get it exact, it weathered",,,,,,it keeps getting overlooked that anyone asking "what color is a ________?" DOES NOT know what color to start with, before he weathers it.
That color is a constant, which color each modeler chooses to start with and then scale effect, weather, or leave as a fresh new coat is what changes.
it is a fairly safe bet that the answer "gray, it was gray" doesn't really help a modeler at all, if he has a color pic, he already knows it is gray. If he has a B+W photo, he reallllllllly needs to know which gray it started as.
Those of us that know which Light Gull Grays match up to the standards should be telling people about them,,,,,,not just say that "all Light Gull Grays model paints are the same", when they very obviously are not.
People talk all the time about how many modelers come and go,,,,,but, how many come on a forum to find out what paint to buy when the call out is "H-315" and instead of being told that "the color is Gunze or Aqous H-315 Flat Light Gull Gray, and you can get that in Model Master enamel or Lifecolor acrylics",,,,,they get told that "you can't match to photographs, and they weathered anyway, etc, etc"
Then they leave without ever finding out that they have a model with one of the easiest colors in modeling to get.
The people asking the very basic questions need a basic answer,,,,,,they will get their own advanced methods and ideas if/when they get their first five kits finished
just my own thoughts
Rex