Body temperature has a very important significance for physical and health conditions and flushed facial color is often a visual sign of medical condition such as fever. In this paper, we analyzed the variation of facial color using far infrared and color images according to body temperature. From facial image, we extracted a skin surface image patch from the cheek part, which is below the eyes and the adjacent to the nose. The color image patch is transformed to CIELAB color space from RGB, and the far infrared image patch is utilized to measure skin surface temperature. The experiment results showed that the change of color with far infrared and color image is related to body temperature.