See the attached excel spread sheet for the chicks I banded last summer.
Simplify it anyway you think.

FYI to explain the banding info:  
1)  Color band column   b/g means black over green    b/r means black over
red
2)  * before any letter or number on the color band Number column means the
letter or number is tipped on its side.  This enables us to use four
different sequences of two letter/numbers (more variety)