Make the yellow stop!

Why are so many European football(soccer for us Yanks) clubs wearing hideous looking yellow away (or third) shirts this year. When I first saw my favorite club's (Celtic) away shirt I was disappointed, but the idea has apparently spread across Europe. The concept of a different away shirt color every year is a foreign enough concept for us Americans but did all of these European clubs have to make it worse by choosing such a bad color? The first six I knew off the top of my head then I decided to check out some of Europe's bigger leagues. Please let me know if I missed any.

Celtic
Arsenal
Chelsea (third)
Hibernian
Derby County
Barcelona
Siena
Juventus
Lazio
Bolton
Everton (third)
Stoke City
West Bromich Albion
Wigan Athletic
Paris Saint-Germain (third)
Olympique Lyonnais (third)
Le Havre
SM Caen