Colour–magnitude diagram of F555W vs. F336W − F814W. Effects of gravity darkening on isochrones with different combinations of rotation rates and ages are shown. The solid lines indicate isochrones with the selected age of 100 Myr; the dashed lines indicate those with about 300 Myr. The blue, red, and green lines correspond to ω_i = 0.00, 0.60, and 0.90, respectively. The metallicity is Z = 0.006 for all the isochrones. There are two cases for the inclination angles: pole on (i = 0°) and edge on (i = 90°), which are the brightest and faintest isochrones, respectively.