Did you know that? I always thought that you needed yellow and blue to make green. But a few years ago in a dyeing class with Judith Mackenzie-McCuin she pointed out that polar yellow combined with black will create a great green. Last night I tried it by over-dyeing this grey shetland I spun up in April with yellow. Too much yellow, unfortunately.
A little eye-searing. I'm going to wait until it dries and see if I can live with it. Otherwise I toss a little black over it to tone it down.