Here are the proposed color schemes so far:
http://bolterandchainsword.com/sms.p...000&gr=000000&
The above is regular, tatical marines, and with modifications, the scout squads.
http://bolterandchainsword.com/sms.p...000&gr=000000&
The above is the (so far) propose armor scheme for the Veterans, sargeants, etc..
There will be subtle differences for assault, devastator, and terminator squads. I just haven't decided what yet.