Mom reminded me that I had a pack of dye on top of the cupboard in the bathroom. Supposed to be blue. Has turned out lilaccy-purple. One tube has covered 5 dreads (I have nearly 60). Here be pics!
It has worked pretty much how I thought it would - not massively impressed, but not hugely disappointed. Considering I didn't pay for it then it's all good! Shows up well against the other dreads, but is most definitely purple and not blue!