There is an excellent book about CONFEDERATE colors that fell into Union hands during the Pennsylvania Campaign. Its called "The ****ed red Flags of the rebellion..." (there is a little more to the title...and I cannot remember what it is ort he author's name)..because Im stuck at work.
I highly reccomend this book. Its about 5-7 years old. Hopefully you can find it, it may be due for an updated edition soon...but I havent heard that that is in the works.
Federal colors that fell into Confederate hands: I have only have heard that the 16th Maine Infantry tore up their colors and passed the remants amongst the men when forced to surrender on the 1st day. I suppose it is not considered as captured.
Hopefully someone will know more.
VS..etc
