springs on my 05 sti ppp
 

hi this might sound a bit daft, but just been looking at my car and was checking my tyres when i noticed a mark on the spring, and when i rubbed the dirt away there was a purple dot and so a cleaned them a bit more and there was a blue dot i was just wondering if these are standard springs and if not what are they, also my intercooler hose is red and i thought they where blue with the prodrive pack fitted. any comments or answers would be great cheers aaron

can anyone help?

Coloured dots on standard spings are normal as is the red pipe