Dereddened colors and effective temperatures for giant (red dots) and dwarfs (black dots). The best third-order polynomial fit is shown, along with 95% confidence and prediction bands indicated by strong and soft colors, respectively. We show the observed colors of OGLE-LMC-DPV-062 during main eclipse in five long-cycle phases as vertical lines, while the solid dashed line shows the average color and the horizontal line the upper limit for the donor temperature, viz., 10 111 ± 308 K (see text for details).