Stewart/Stuart Royal (B,W. & Grey)
In pattern KRKRKWKWKWKWKWKWKRKR.
This was sourced from register-of-tartans. It is a 20 stripes tartan.
Original link https://www.tartanregister.gov.uk/tartanDetails.aspx?ref=3955
Thread count
K/8 N11 K16 N4 K4 LN4 K4 LN19 K14 LN4 K14 LN4 K14 LN19 K4 LN4 K4 N4 K16 N/11

Palette
Each colour and its ΔE from the base-6 reference it is a variant of.
| Colour | Shade | Base | ΔE (OKLab) |
|---|---|---|---|
| K | #101010 #101010 | K #000000 | 0.17 |
| LN | #E0E0E0 #E0E0E0 | W #F4F4F0 | 0.06 |
| N | #888888 #888888 | R #C80000 | 0.24 |
ID: /setts/s20/k8r11k16r4k4w4k4w19k14w4k14w4k14w19k4w4k4r4k16r11-k101010-r888888-we0e0e0/