The Krypton Factor were set. The contestants, from 1986 onwards, all had their own corresponding colour, either red, green, yellow or blue. They wore their own clothes, apart from the Physical Ability round where the contestants wore track suits which were, in early series, red, burgundy, orange, green, black, light blue and dark blue. From 1986 onwards, the tracksuits were red, green, yellow and blue, and varied in design over the series that followed. The track suits changed to black with a coloured stripe from 1990 to 1993. For their own clothes, the contestants either wore a shirt/blouse, tie or a neckscarf of
Of the Blue Colour of the Sky in producer Dave Fridmann's Tarbox Road Studios, a converted Amish barn in Cassadaga, New York, through May the following year. Bassist Tim Nordwind described the process of the studio sessions as a midpoint between the slick production work done on "OK Go" and the emphasis on live takes with the recording of "Oh No". "Of the Blue Colour of the Sky"'s accompanying booklet presents the album as a concept based on an unnamed passage from "The Influence of the Blue Ray of the Sunlight and of the Blue Colour of the Sky" by General A.J. Pleasonton. The title of this