Tyranid Paint Scheme

So to help my brother move his tyranid progress forward, we decided to talk about a paint scheme. He told me wanted a paint scheme that

1) makes your head hurt or vomit at the sight of it
2) is like a poison dart frog

We tried several paint schemes and thanks to this website http://thetyranidhive.proboards.com/index.cgi?board=painting&action=display&thread=21344 we were able to paint a termagant virtually. You need to sign up for this though :) So we had like 3 schemes but then decided to go with this one. So what do you think? (Pics are arranged by order of completion)

Edit - whoops! forgot about the eyes! though they would be yellow ;)