Still a little way to go, but here's the basic scheme for the models...
They are painted with the same basic colour choices as the rest of my client's Tyranid army, and I think that en masse they will look great!
I'm going to add some speckling to the exposed skin of some of the rippers, to add variation. These ripper bases are a lot of fun to paint. They are insanely detailed and drive you a little made during the painting... I must've gone over this base about ten times to make sure that I hadn't missed a claw, a tooth or an eye.