After having a hard time piecing together accurate 'what years was x color offered' information each time one gets asked about, and wondering about this myself, I decided to make a table of all the Firebird and Camaro exterior colors and the years they were used in.
This is complete/correct as much as I can determine... let me know any questions/comments.
14.2 KB Zip file attached, which contains a 401 KB HTML file.
Order of color groupings: Black, Gray, Silver, White, Cream, Yellow, Light Green, Green, Turquoise, Light Blue, Blue, Dark Blue, Purple, Maroon, Red, Orange, Gold, Brown
(And here is a chart of 1982-1992 and 1993-2002 interior colors:
http://www.fbodymotorsports.com/82_92colorchart )