Colours change with a fashion. As Stamford says - white was poverty - that's why police cars and builders vans were white. Then some bright spark started the whole white with black wheels thing and it took off.
I love it. If I ever colour change the "Red Shed" - it'll be white - well - maybe orange - or maybe light blue - but it will NOT be yellow..... 
__________________
------------------------------
------------------------------
__________________
------------------------------
------------------------------
|