Inexpensive Kilts

[gilmore]

While the colors of some had meaning, the pattern itself (to my knowledge) did not. There's no reason why they used a thread count of 45 green vs. 40 green in the Irish national (to make up a couple numbers). The pattern itself was designed based on Polly's likes / dislikes and Scott Chalmers' likes and dislikes.

Or perhaps what was thought to be marketable?

[RockyR]

Or perhaps what was thought to be marketable?

That was implied by "Likes and dislikes". They knew they were designing them for "public consumption", so they tried to make the most appealing tartans they could.