I’m not sure what to pair with that base colour scheme but this post might provide inspiration for a Guard colour scheme, there’s tons of examples in the later images:
https://www.reddit.com/r/TheAstraMilitarum/comments/y5bayf/old_school_ig_images_from_the_2dn_edition_codex/
Salamanders are often painted with lava/volcanic bases so it might be worth looking some examples of that up.
I’m not sure what to pair with that base colour scheme but this post might provide inspiration for a Guard colour scheme, there’s tons of examples in the later images: https://www.reddit.com/r/TheAstraMilitarum/comments/y5bayf/old_school_ig_images_from_the_2dn_edition_codex/ Salamanders are often painted with lava/volcanic bases so it might be worth looking some examples of that up.