Thanks all.
As usual, it seems my style is a bit like Marmite!* Honestly, though, the saturation levels are pretty accurate to the mini in my hand, the spear haft and bolter casing are very 'grey' reds. This was a deliberate choice to keep the emphasis on the face and chestplate, by flanking it with more subdued colours in the red weapon haft and purple and grey cloak. With such a static model, the face really has to be the focal point, and I think I've actually managed that quite nicely here.
I'll definitely concede Talizvar's point about the spear blade being a bit
too muted, I definitely wanted to take that brighter but I'm still experimenting with this style of power weapon (as opposed to ones with alternating bright and dark bands, or just very sharply highlighted edges) so as I get more experienced with the method I'll almost certainly go back and sharpen that up a bit.
*By which I mean you either love it or hate it, not that it's god's gift to the cheese sandwich.