That is how mine look right after AF. I would say probably within a few days to a week it should lighten. However, I should note that sometimes immediately following a mc you may not ovulate before your first period. Some people do, some people don't. If you don't, you should get your first real period about 4-8 weeks post mc and will more than likely ovulate again after that period as your menstrual cycle returns to normal. Good luck!