In program production in NHK, we use professional cameras of different makers together. Moreover we sometimes use cameras for consumer use because of increasing video quality. When we adjust the tone of color of the above different cameras, it is difficult to adjust the same tone by tuning only Whitebalance, Blackbalance, Gamma. We have developed Color MTX Corrector Unit for camera System with Sugawa Video Engineering co., Ltd. This unit enables different cameras to adjust the same tone of color by correcting color reproducibility with color matrix circuit.