Rainbow flag Alliance (ICA) designed an international co-op symbol and a flag for the first "Co-operators' Day," which was held in July 1923. After some experiments with different designs, a famous French cooperator, Professor Charles Gide, suggested using the seven colours of the rainbow for the flag. He pointed out that the rainbow symbolized unity in diversity and the power of light, enlightenment and progress. The first co-op rainbow flag was completed in 1924 and was adopted as an official symbol of the international cooperative movement in 1925. In 2001, the ICA's official flag was changed from a rainbow flag to a
Away colours base their road uniform around a white jersey. While a team's primary kit rarely undergoes major changes, the second colours tend to vary over time and sometimes by tournament. Some away kits are a modification of the home colours (for example a reversal of primary and secondary colours), other away kits are considerably different from home kits. Several club and national sides have favourite away colours which might remain the same more or less continuously. Often these are colours that were used in famous victories; for instance A.C. Milan (white) and Brazil (blue). Many professional clubs also have an official