I like to go with a simple grey with red highlights. Basic, but sharp looking.
Spoiler
Got an interesting Kraken scheme, but all I got sceenshot wise of it is this one. ;https://steamuserimages-a.akamaihd.net/ugc/2440264899362088061/FA53C21EB711A58B3A8F796354E61A2C92004E63/
Might come back later with a better view if the thread doesn't get locked.