The Rainbow Books are a collection of standards defining the allowed formats of Compact Discs.

• Red Book (CD Digital Audio),
• Yellow Book (CD-ROM and CD-ROM XA),
• Orange Book (CD standard) (CD-R and CD-RW),
• White Book (Video CD),
• Blue Book (Enhanced Music CD, CD+G and CD-Plus ),
• Beige Book (Photo CD ),
• Green Book (CD-i).
• Purple Book (Double-Density CD )