Emblems are made up of a few different elements not a complete picture: primary color, secondary color, the graphic and patterns. There are like 16 chooses for primary color, 8 for secondary, 3 different patterns and at least 20 pics per realm. (BTW that is numbers per daoc catacombs and think they might of added more color options since)
Somehow our number must be a combination of the above, probably relating to certain bits defining different properties.
This site has a nice emblem designer:
http://daoc.catacombs.com/emblem.cfm