Using a categorical scale of 10 U, we have assessed color harmony in two-piece garments (jackets-trousers) considering a vicenarian and a quinquagenarian style. The experiment was performed by a panel of 59 Chinese observers (26 males and 33 females) with normal color vision and ages ranging 20-78 years, considering 300 color combinations for each of the two styles. For a given color combination, comparing results in the vicenarian/quinquagenarian styles for female/male observers, and observers below/above 45 years old, we found generally higher harmony scores for the vicenarian style, male observers, and observers older than 45 years. We found statistically significant differences (Welch two-sample t test, P< 0.001) between color-harmony results for the vicenarian and quinquagenarian styles, as well as considering the scores reported both by male/female observers and by observers below/above 45 years old. We propose a very simple lineal model fitting our current results with an average root mean square error (RMSE) of 0.70 U in our 10-unit scale, which is below the one achieved by other complex models previously proposed, and also below the inter- and intra-observer variability in our experiment. From our total experimental results, each of the five traditional color-harmony principles (complementary hues and equal lightness, chroma, tone, and hue) was found to be valid at a low percentage (53-58% of the cases). (c) 2016 Wiley Periodicals, Inc.