This is very interesting. I found a white tick on my dog the other day and removed it. I was confused and wasn't sure if it was a tick at first because of the color. But it looked just like a tick otherwise and I could tell that the head was under the skin.
I guess it's sort of good that ticks turn white because that way, we know that they've been feeding for a while. I know that the longer ticks feed, the higher the chances of infecting their host with a disease. I took my dog to the vet after I removed the tick (I took the tick with me in a bottle) to make sure that he would be okay. Thankfully, he's absolutely fine.