The smallest overall color change upon staining in red wine was recorded for Vita Physiodens denture teeth (DE* = 0.9 0.4), followed by SR Vivodent PE 1.2 (0.6) and Portrait IPN 2.4 (0.6). Corresponding values for staining in coffee were 2.0 (0.6), 1.7 (1.0) and 1.8 (0.8), while ageing-dependent changes in color were 1.7 (0.4), 2.4 (0.8) and 1.1 (0.4) for Portrait IPN, SR Vivodent PE and Vita Physiodens teeth, respectively. Conclusion: Although the null hypothesis has been partially rejected, because some statistically significant changes in color and color coordinates occurred upon staining and ageing