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RGB is an abbreviation for:

  • the basic colors red, green and blue, see RGB color space
  • RGB signal , a standard for video image transmission
  • Rossijskaja gossudarstwennaja biblioteka (Российская государственная библиотека), the Russian State Library
  • Reconnaissance General Bureau , North Korean Secret Service

.rgb stands for:

  • File name extension for the building on the RGB color space image format that was developed by Silicon Graphics and also as Silicon Graphics Image is known