Brighter than I'd have on my lot, but there's no mistaking them for Aurora Chapter or Sons of Medusa!
I think the gradiation is the key I try to achieve when I've been heavy shading my lot- not quite sharp edge highlights to against dark armour (a la Dark Angels), but to have patches nearer the edges that evoke the colour, but with a lot of it dark because its in a sort of... Inky shadow.
Difficult to pin down, but I always imagine Salamanders as brightly coloured, but in poorly lit/dark room. Splashes of strong colour, but with deep darkness too, rather than strikingly dark armour.
But shading with ink seems to yield that result for me, and it sounds a bit like what you're aiming for with too.
Do you have a thread or pictures somewhere so i can see? That would be nice 😀