Last fall I went looking for my stash of colored linen thread. I never found it (if I had any left, which of course I couldn’t remember!). I only needed a small amount so I ended up coloring white linen thread with acrylic paint and a brush. Then the other day I saw a reference to Heidi Ferguson’s Hand Dyed Linen Thread. Seems much more economical than dying batches of thread myself (however, to do it yourself, here are directions).