Shock absorber colours and springs for D2 2.8QS

[Ronin]

Hi does anyone know the difference between different colours of shock absorbers and different springs? for example my QS has red shock absorbers but there's also green, grey, pink etc? same goes for springs there is 10's of choices.

I'm looking to put standard 2.8QS springs and sandard shock absorbers as currents one all leak and springs are rusty and I preffer comfort to sporty ride, plus the springs are non standard and to put the car on a lift my mechanic had to adjust the round supports all the way down and it still just about went under the jacking points... It's way too low.

I can see lots of different pard codes in vag catalog just can't narrow it down, can anyone help me with some part numbers?