Color Errors in Adobe After Effects

Hi there! I am very new to After Effects, so I'm not sure if my issue is just user error or there's something wrong with the software / my video file. I downloaded a .mov file of a paint effect -- I'd like to change the color of the paint effect from white to blue. But, when I import the .mov file into the timeline, the white paint effect turns hot pink? I'm not sure if it's because After Effects doesn't like .mov files, or if I'm doing something wrong? I tried adding an adjustment layer with a "change color to" effect so I could change the pink to blue, but that didn't work. I've included an image of the paint effect as being pink...Thank you for your help!