Don’t really know, it’s been over forty years since I got out!!
Let me contact the local ID office here and see what they say.
http://www.ehow.com/about_4674638_military-ids.html
Types
Military ID cards, also referred to as Form 1173, are color-coded to identify the status of the cardholder at a quick glance. A green identification card is issued to all active duty personnel as well as reservists. A blue ID card is issued to retirees or those who have been honorably discharged with veteran benefits. A tan card is issued to the eligible dependents of retired military personnel. A red ID is issued to the eligible dependents of reservists.
Read more: About Military Ids | eHow.com http://www.ehow.com/about_4674638_military-ids.html#ixzz1dtS2X9wU