This Wiki has numerous blank templates so you can create unooficla diagrams to show colour schemes. To show a Chapter or Legion's colour scheme, one should create their own artwork. Please adhere to this policy, any images that breach it will most likely be deleted. To avoid breaching copyright, this Wiki has a policy for army's colour schemes. Tyranids destroyed it, (in 5th edition i think!).
Many Imperial Guard Tank designs were said ti have originated from that world. It's Titan Legion and colours were used as colour scheme examples in Epic rulebooks. What is your main race and colors? (R first #, G 2nd #, B 3rd #) Mine is Imperial Guard Army name: 612th Armored Legion Primary: 75, 80, 110 Secondary: 90, 90, 90 Trim: 255, 255, 255 Weapon: 100, 100, 100 Trim 2: 90, 90, 90. Curious to see what color schemes others are using. I'm a big fan of fire, so I'm thinking a flame on each left shoulder or something. That said, I'll probably include something in the scheme to represent their homeworld. The fact of the matter is, most worlds (or most places on most worlds) will probably be a combination of browns, grays, and greens (you know, for photosythesis).