MacIntyre, or Perthshire
In pattern BBRBRGRBRGRBRGRBRGRBR.
This was sourced from weddslist. It is a 21 stripes tartan.
Original link http://www.weddslist.com/cgi-bin/tartans/pg.pl?source=sts
Thread count
Ba/2 B6 R6 B42 R6 G14 R12 B16 R6 G42 R6 B6 R6 G42 R6 B16 R14 G14 R6 B42 R/6

Palette
Each colour and its ΔE from the base-6 reference it is a variant of.
| Colour | Shade | Base | ΔE (OKLab) |
|---|---|---|---|
| B | #304080 #304080 | B #2C4084 | 0.01 |
| Ba | #5480B0 #5480B0 | B #2C4084 | 0.20 |
| G | #008000 #008000 | G #006400 | 0.09 |
| R | #C00000 #C00000 | R #C80000 | 0.02 |
ID: /setts/s21/b2ba6r6ba42r6g14r12ba16r6g42r6ba6r6g42r6ba16r14g14r6ba42r6-b5480b0-ba304080-g008000-rc00000/