Hello Tobbe,
By RAL I believe you are asking for the paint color code, correct?
We have touch up paint available that can be purchased through your local dealer. As far as what the actual code is for mixing I am not sure. Your local dealer in Sweden would be LAPAB, here is their information.
LAPAB Maskin AB - Generalagent för Ventrac och Wright
info@lapab.com
011-46-220-22560
PO BOX 46, S-734 22 HALLSTAHAMMAR, SWEDEN
Here is information on the part numbers of the different colors.
Touch Up Paint:
Ventrac Red Spray Paint
Spray Can #00.0048
Touch Up #00.0204
Ventrac Tan Paint
Spray Can #00.0143
Touch Up #00.0203
Ventrac Black Paint
Spray Can #00.0183
Does that help you? If you have any other questions or I misunderstood your question just let me know!