For now, here is a brief response on the most likely technical interpretation:

The system currently consists of , including 15 pearlescent colors. Because the range is limited and curated, it offers high reliability and widespread availability.

The system was originally developed by the Reichs-Ausschuss für Lieferbedingungen (RAL), or National Commission for Delivery Terms, to simplify color communication for government and industrial projects. By assigning a unique four-digit code to each hue, manufacturers can guarantee that "Signal Blue" in one factory perfectly matches the same shade produced by a supplier thousands of miles away.

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