In this paper, the authors have developed a wide color gamut WXGA LCD monitor with a color calibrator. We have successfully developed a six-primary-color liquid crystal display (LCD) using six-color light-emitting diodes (LEDs). More specifically, a prototype of a six-primary-color LCD having a color gamut of 170% or wider than that of conventional techniques has been constructed. Furthermore, this monitor has our original color conversion circuit and a newly developed calibration system using an integrated color sensor, so that it can reproduce appropriate colors and keep its white point chromaticity stable.