The colour codes are not relevant ? How then does the car know which wheel is where ?
I wanted to explain to bigstu how to check the valves are present.
Yes the cars had metal caps from new but a small amount of copper ease on the threads solves the sticking problem.
What did the indep do that caused you to need new valves ?
If I am right in my assumptions that they tried to remove your valves rather than leave them on the wheel. I would go back to them and get them to pay for the replacements because if they knew what they were doing they would not have damaged them in the first place.
Laguna II tyre valves include the sensor and should not be removed during replacement tyre fitting.