Almost all the kilt hose threads I've read bring up either "a kilt's minor colors" or hose "bottle colors."

How do "bottle" colors differ from "regular" colors? Why are they called bottle colors?

Are the kilt's minor colors those of the tartan's overcheck (i.e., the thin stripes that are on "top" of the wide stripes of the undercheck)?

Some of those thin, overcheck stripes are bounded by a different colored "border" on either side, such as those in a Mackenzie. Would that "border" color also be a minor color?



Thank you.