I have also been experimenting with dyeing roving. After one small disaster the next couple of tries turned out much better. This lavender and mauve one was supposed to have grey in it, but it just got lost with the purple shades. So I just dyed up some grey separately that I am incorporating into the single plies. This is the roving that I am currently spinning and while I haven't gotten very far on it (it has been too nice outside to be spending time inside spinning) so far I am pleased with the results.
This roving is my latest to be dyed. It turned out to match the image I had in my head fairly closely which, to be honest, surprised me. The blue turned out a little more vibrant than what I was trying achieve, but other than that the very pale pink and lilac came out pretty close to what I wanted. At this point I think each of these dye jobs will be made into a 3 ply sock yarn.