Well I did contemplate whether RLM02 could have been the mystery triangle colour applied under the "24" which wouldn't be outside the realms of possibility.
Concerning your last question: At the factory the pre-war 4 colour splinter undoubtably only consisted of RLM61/62/63/65. These were official diagrams and the precise colours were stipulated on them. As much scientific as colourful, these specific paint colours and splinter patterns would have been devised by experts in camouflage and colour theory based on the colours that would have been commonly encountered in the theatre where those specific aircraft would be operating. I think that any deviation from the official RLM approved patterns or colours that were specified to be used in those specific patterns would have been prohibited. I have seen zero evidence to suggest otherwise. Same with the later RLM70/71/65 splinter pattern. When they leave the factory however, that is when certain areas tend to get meddled with and we start to see anomalies to what we would expect, but you know the factories were charged with supplying exactly what the RLM wanted and for the factories to use non standard colours with certain splinter patterns it would not have been accepted in my views as long as there was adequate stocks of the paints available. This issue however during pre-war periods and early WW2 would not have been a factor. I'm not so sure how available paint stocks would have affected the camouflage schemes devised during late war times as that's not really my area...
