I have a slight problem and could use a bit of advice.
A few years ago I started on a kit from Thea Gouveneur - one of the Pansie series.
This was one of my first kits - a great kit at that, but somewhat advanced. Being new to cross stitching at that time, I made some mistakes which left me with much less thread than I needed.

But this has stuck a bit in my craw

As I have said, I am out of many colours and need some help as there are no standard colour numbers (DMC, Anchor or anyone else). When this problem originally happened, I had written to TG for some help, but they never responded. Of course by now I have enough stash to fill in quite of the missing colour, but there are still some left - and this kit has many slight variations of blue to purple. Any ideas?

Thanks for suggestions,
William David