CMDs used in order to estimate the stellar parameters for model atmosphere and synthetic integrated-light spectra. Filled circles, represent the colours extracted from theoretical isochrones for metallicities Z = 0.004 and Z = 0.008, and ages of 56 Myr and 12 Myr for NGC 1313-379 and NGC 1705-1, respectively. Empty circles show the empirical CMDs from Larsen et al. (2011). In the Isochrone-Only method we use both, red and black filled circles. For the CMD+Isochrone method we instead use the empty circles and the black filled circles.