Effect sizes for each of the predictor variables on the three CIELAB colour coordinates (L = dark‐to‐light variation, a = green‐to‐red variation, b = blue‐to‐yellow variation), based on (a) single predictor models and (b) multiple predictor models (N = 273 species). Red denotes females and blue refers to males. Shown are the means of the model coefficients for the 1,000 phylogenetic linear models and the corresponding 95% confidence intervals. N indicates the number of species included in the analyses (determined by data availability)