Rules of heraldry

• There are two metals: Or and Argent. (They are commonly substituted by Yellow and White - especially on flags.)
• There are 4 colors: Gules, Azure, Vert, and Sable.
• A color can not be displayed on top of another color. Therefore, a vert charge may not be displayed upon an azure field. However, if the vert charged is outlined in metal, it may be used.
• Metals may not be displayed atop metals. Thus, you may not display an or charge atop an argent field. However, if the or charge is outlined in color, it may be used atop an argent field.
• The coats of arms should be distinguishable out of some distance.
• The main charge should cover its field.
• Each coat of arms should be unique.