Twice In The Last Week When Waking Up, My Vision

Twice in the last week when waking up, my vision was all a different hue. The first time about a week ago, everything was initially a very intense yellow that faded out in a second or two. Then this morning, everything was an intense green hue, again only lasting a couple of seconds till everything looked normal again. I am 24, not on any medications, occasional smoker and craft beer enthusiast. Im not sure if this should be something to be concerned about.