There has been a 300 series in both red and yellow, a Boone and Crockett 309, 303, and 301 in green, and a BCCI 301 offering in white but I don't think I have ever seen anything in blue. Below is some information, which does not include any Chinese made knives, that is in a previous thread regarding the 303 ONLY. Currently, the only USA made 300's, which is now apparently limited to just the 303 and 301, is black sawcut Valox and woodgrain. You will need to search the secondary market for the others.
Bucks 303 Cadet Handle colors and year:
303—Black Sawcut Schrade & Camillus—c. 1967 until they were made in house by Buck*
303—Black Sawcut—c. 1980's to present including all special editions models.*
303—Elk Stag—c. 1988
303—Red Jigged Bone—c. 1988 & 1989*
303—Grey Sawcut Workman—(2 versions)—c. 1988 & 1989 w Buck or KBH Shield*
303—Red Smooth Delrin—c. 1989*
303—Brown Jigged Bone—(3 versions)—c. 1989, 1992 & 2000 w LE medallion
303—Sambar Stag—c. 1989 & 2008
303—Yellow Sawcut—(2 versions)—c. 1989 & 1995*
303—Red Sawcut—c. 1992
303—Polypearl—(3 versions) White, Gray & Black—c. 2002*
303—Black smooth buffalo/mother of pearl handle and no rear bolster—c. 2007
303—Green Paperstone Boone & Crockett medallion—c. 2009*
303—Black Jigged Buffalo Horn —c. 2008*
303--Ironwood with Eagle Feather Inlay - c.2008
303—Charcoal Dymondwood—c. 2009 w medallion & 2010
303—Rosewood Chairman Series—c. 2010
303—Yellow Comfort Craft—(New version)—c. 2010
303--Smooth Black Valox - 2011