I've got some flying tyranid guards that I'm currently painting and I need to somehow depict the Deathspitters they hold so the colour of it doesnt blend into the rest of the body.

The body is a dark purple and wings is I think a Liche purple. I use red for spikes and armour and there is already some white detail as well.

See examples at http://s644.photobucket.com/albums/uu16 ... /Tyranids/

I usually would use green for pipes/wires from the deathspitters to the arms, but in these minatures, I don't really want to add these.

So any ideas how I could inject some other colour to the Deathspitters? I was thinking of venom sacs, as the green bile would slightly make the weapon stand out, but I don't think that would work?

Any ideas?