Complex sentence: Nickelodeon/Mattel's third kind of Gak that changed color when exposed to sunlight, colors varied from Blue to Light Blue, Green to Light Green and Purple to Lighter Purple.
Split into simpler sentences: Nickelodeon/Mattel's third kind of Gak that changed color when exposed to sunlight. Colors varied from Blue to Light Blue, Green to Light Green, and Purple to Lighter Purple.