We report the test results and technical details of a system we developed that improves the quality of telemedicine. The spread of COVID-19 has accelerated the need for telemedicine to more effectively prevent infections. However, in traditional Japanese (Kampo) medicine, where color is an important examination factor, accurate diagnoses cannot be made without adequate color reproduction. Since commercial smartphones are not capable of reproducing colors with the level of fidelity required for medical treatments, we created a color chart that includes the colors of the human skin and tongue that helps doctors identify their colors more accurately during a telemedicine examination. Using a mobile device, we also created a telemedicine system that includes automatic color correction with a color chart and non-contact heart rate measurements.