I chose to go for a deep blue grey so the red details whould stand out more and identify them as Saim-Hann. Planning to paint an Eldar army is really difficult because you have to work a lot of colours into the paint scheme.
I acchieved the blue armour by priming them black, then basecoated with Fenris Grey, washed with slighty thinned Asurment Blue and then highlighted with Shadow Grey and VGC Steel Blue. Of course don't allow the wash to pool!
Overall I'm not so keen on the models, because I think the proportions of the helmets are ridiculous and I also don't like what you can do with the kit for the Exarch.