HM and CC microlensing light curves of limb-darkened and blended source stars are plotted. Details are similar to those in Fig. 2. The lensing parameters are listed in Table 3. In the residual parts, the perturbations in stellar colors V -I and B-R during the lensing effect due to LD and BL effects are shown by dashed (black and gray) curves, respectively. The corresponding chromatic BL-induced perturbations are shown by solid curves. The right-hand insets (colored schemes) represent brightness profiles over limb-darkened source disks.