Rainbow Books:

The so-called "Rainbow Books" are a collection of documents published by the
National Security Agency (NSA) and the U.S. Department of Defense (DoD) on
computer security. Of these books, the most important is the DoD's Orange
Book, on standards for security systems in computers. (All the other books
basically expound on this one.) The following are the colors and titles of
these Rainbow Books:

Aqua: Understanding Security Modeling
Blue: Product Evaluation Questionaire
Bright Blue: Trusted Product Evaluation
Bright Orange: Understanding Security Testing
Brown: Understanding Trusted Facilities
Burgundy: Understanding Design Documentation
Dark Lavender: Understanding Trusted Distrobution
Dark Red: Interpretations Of Environments
Gray: Selecting Access Control List
Green: D.O.D. Password Management (DoD)
Green: Understanding Data Remanence (NSA)
Hot Peach: Writing Security Features
Lavender: Data Base Management Interpretation
Light Blue: Understanding Identification And Authentication In Trusted
  Systems
Light Pink: Understanding Covert Channels 
Neon Orange: Understanding Discretionary Access
Orange 1: D.O.D. Trusted Computer Systems
Orange 2: Understanding Configurations
Pink: Rating Maintenence Phase
Purple: Formal Verification Systems
Purple 1: Guide To System Procurement
Purple 2: Guide To System Procurement
Purple 3: Guide To System Procurement
Purple 4: Guide To System Procurement
Red: Interpretation Of Evaluation
Tan: Understanding Audit In Trusted Systems
Teal Green: Glossary Of Computer Terms
Turquiose: Understanding Information Security 
Venice Blue: Computer Security Sub-Systems
Violet: Controlled Access Protection 
Yellow: Computer Security Requirements
Yellow 2: Computer Security Requirements
Yellow 3: Understanding Trusted Recovery
Yellow-Green: Writing Trusted Facility Manuals