Hmmm what passes as dusky in Indian media? Pratyusha is dusky, but in her show there is a fair bit of make-up on her, she looks noticeably darker in JDJ for example. Why not keep her natural skin tone on the show also? Mitali is dusky, but her role emphasizes her colour, i.e. the repeated emphasis on 'she's dark, she doesn't suit her husband, etc'. Deepika doesn't seem dusky in the show, is she in real life?
Gulki is dusky, and its good they haven't used much make-up to hide that, she looks very beautiful on the show. And for once there is no emphasis on her skin colour in this show, she is simply accepted as beautiful and that is that.