According to the Liverpool website and an adidas press release:
Liverpool FC and adidas have turned the clock back almost 120 years for the inspiration behind the brand new 3rd kit with the inclusion of Cyan Blue a throwback to Liverpool FC’s first ever home kit back in 1892 which incorporated alternate white and blue halves.
The new Liverpool FC third kit takes its design inspiration from the classic tracksuit tops worn by the infamous LFC teams of the mid 1980’s, incorporating the diagonal stripe across the front of the shirt.
Drawing from history and tradition, the new kit showcases a stylish modern twist and is equipped with adidas apparel technology such as TechFitâ„¢ and Climacoolâ„¢ giving Liverpool FC players an extra edge on the pitch.