Codex Colour Choices

[egon]

I was flipping through the codex and something caught my eye. On pages 74 and 75 there are a couple of guardsmen (a kneeling grenade launcher, a couple of guardsmen below him, a sergeant and a commander with PP and PS) that are painted differently from the rest.
Their uniform is a pale greyish colour.

Does anyone know which colour it is? It's not Deneb I think, Deneb is more tan/brownish than grey.

Cheers!

[syphon]

I noticed them too. I however do not think it's a different colour scheme. It's a miscolouring of the codex, as far as I can tell. Some of the other pages have these too.