Q5 Alloy Wheel Paint Code

[MikeMc]

Hi, can anyone provide the recognised paint code for 20" Speedline Alloys fitted to a Q5 S-line plus.  On the rear of the spokes are the following mumbers, SL2158 and 8RO 601 025 Q.  I have already contacted our local Audi Dealership and Audi UK and the best they can do is provide the code number W90. However this is not recognised by the guys in the paint shop. Many thanks, Mike