I played with the dyes that arrived from KraftKolour. I mixed the powders (about 50/50) to get an orange from the red & yellow, a purple from the red & blue, and a green from the blue & yellow. These pieces of fabric are the results of the baggies "cooking" in the sun using only one colour per piece so I have a colour reference for the future. I mixed up far too much dye so had a go later in the week as well with some yarn. And I've still got some mixed up dye left. Apparently they gradually lose reactive strength once mixed with water so I'm probably not going to get much else if I try to use them - but I will chuck something in to see what happens. If it doesn't work I haven't lost anything as I can always dye it again. I really like the Rubine.
This is the yarn that I think looks like the plumage of the Spendid Wren. I first dyed the yarn blue, then overdyed with red, purple and rubine. I was so pleased with it I started crocheting a top for myself as soon as it was dry! It will be a miracle if I look as good in this as the wren does in his finery :-)