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
Orange (colour) with green, of yellow with violet ... trying to make the colours intense and not a harmony of grey". In another letter he wrote simply, "there is no orange without blue." Van Gogh, Pierre-Auguste Renoir and many other impressionist and post-impressionist painters frequently placed orange against azure or cobalt blue, to make both colours appear brighter. The actual complement of orange is azure – a colour that is one quarter of the way between blue and green on the colour spectrum. The actual complementary colour of true blue is yellow. Orange pigments are largely in the ochre or cadmium families,