From Muppet Wiki

Written by	Joe Raposo
Music by
Lyrics by
Date	1972
Source
Publisher	Jonico Music, Inc.

"Just Three Colors" is a Sesame Street song sung by Big Bird and Oscar. They explore how from the three colors red, yellow, and blue it's possible to make all of the other beautiful (and ugly) colors of the rainbow.

Audio Releases

• Havin' Fun with Ernie & Bert (1972)
• Marching Song/Just Three Colors (single, 1972)
• Big Bird Sings! (1974)
• The Best of Big Bird (1983)
• The Bird is the Word! (1995)