Mantis Lost Color


In Memoriam
my mantis didn't come out of his burrow for a few days, wouldn't even eat the food i dropped in(i even put in a snail). i dont know all the terms or scientific name for the parts of his body, but there were like little feet and some skin from his back on the floor in the tank, so i assumed he was molting. then he came out of his burrow today and his back was like a whitish gray color when it used to be a darkish red. is he sick or is this a normal part of the molt?
Mine is almost three inches changed from maroon red to greyish pink with blue claws.Sorry I don't have a digital camera.