Could blue colored juice cause a toddler's poop to turn a very bright green color? My mil watched my…

Could blue colored juice cause a toddler's poop to turn a very bright green color? My mil watched my daughter today cause my babysitter closed her daycare for a couple days cause there all sick, and when I changed her she had loose/soft mucusy bright green poop. Sorry for the tmi just curious. I tell her not to give her juice but she doesn't listen.