The Flower of Scotland has no red on the green check. Rather, it has blue lines at the edges of the green check, and a blue line in the center of the check. I'd say what you have is a fashion tartan.

By the way, tartan #6 on your site would be identical to the Elgin City Band tartan if the thinner yellow line were the same width as the thicker one, and if the two shades of blue were swapped.