Dye wood, fungi, and lichens. Most dyes are synthetic, i.e., are man-made from petrochemicals. Other than pigmentation, they have a range of applications including organic dye lasers, optical media (CD-R) and camera sensors (color filter array). Textile dyeing dates back to the Neolithic period. Throughout history, people have dyed their textiles using common, locally available materials. Scarce dyestuffs that produced brilliant and permanent colors such as the natural invertebrate dyes Tyrian purple and crimson kermes were highly prized luxury items in the ancient and medieval world. Plant-based dyes such as woad, indigo, saffron, and madder were important trade goods in the
Blue Is the Colour (song) of the Norwegian team Molde FK also use a variant of a song, where the title ("Blått er vår farge") directly translates to "Blue is our colour". The rest of the refrain is somehow altered, however. An adapted version called "Green is the Colour" is the official fight song of the Saskatchewan Roughriders of the Canadian Football League (Canadian football, not soccer.) This should not be confused with the Pink Floyd song "Green Is the Colour". The song was used as the basis for a campaign record used by the successful Conservative campaign in the 1979 general election. The song