Mass-loss rate as a function of luminosity. The fit to the empirical mass-loss rates and its 1σ uncertainty are indicated with the dotted green line and the shaded region, respectively. The mass-loss rate – luminosity relations of Krtička & Kubát (2018) and Björklund et al. (2021) are shown with the dashed blue and yellow lines, respectively. For the mass-loss predictions of Vink et al. (2001), we used their equation (24) to obtain the predicted rates for each star based on their properties. The magenta V indicate these rates, and the dashed magenta line corresponds to the fit to these points. The light blue stars indicate the mass-loss rates of equation 7 from Gormaz-Matamala et al. (2022b). Points with a red border are unreliable fits that are likely not representative of their physical properties; these are not included in the fit.