Sometimes I find the color of text boxes changed to a different color. This seems to happen when I reopen the same slide deck later. 

In the image that I am attaching, you see that the colors of the whole "virus," the "irology" part of "virology," and the "accine" part of "vaccine," all changed to a lighter color. I did not make those changes myself.

Thanks in advance for addressing this issue.

Yasuro