to give you an example of the problem facing you with trying to match colors of Tartan here are two examples of the exact same Tartan woven by two different weaving mills.



this is the USMC Leatherneck Tartan.
The upper sample was woven by D.C. Dalgleish.
the lower sample was woven by Strathmore.






And these are two samples of the Victoria, City of Gardens Tartan that I designed for my adopted city.

The top was woven by D.C. Dalgleish.
The lower was woven by Marton Mills.

And here is the official Scottish Tartans Authority image for the same tartan.




And don't even get me started on the X Marks Tartan.