Grey cover seems to be replacing the yellow dots that are default but also light cover. Good idea, since less experienced people could easily assume everything is light cover and only bother with green dots. It'd also help veterans because when you put a squad in light cover, you'd also see if anyone is out of cover. I'm not sure why yellow dots were used to represent no cover and light cover to begin with, but this is a welcome change, however small.
2 theories on spraypaint:
- Could be for colouring captured tanks, such as a captured Panzer IV being repainted Green.
- Could be default colour like others have said. I hope for this (with proper restrictions, no hot pink clown kubels), because:
I saw yellow cover and grey cover used together, so i would assume that grey color shows what squad members will not be in no cover