White and red orb of light hovering over Tri-Cities.Driving home from Kennewick, WA, to Richland, WA, at about 21:20 (9:20pm) my wife and I witnessed a UFO flying over Richland and Kennewick, WA.At first sight I noticed a bright white light in the sky that appeared to be a bright star. As we continued driving down the highway the light clearly was getting larger, brighter, and looked as if it were getting closer to the car. At this time now (10-15 seconds) it went from looking like a bright star to possibly a light to a plane of some sort.Having never seen a plane light look like what I was observing, I then asked my wife, "what is that in the sky?". The light was brighter than any plane light I had ever seen, and stayed on like a headlight rather than blinking like most planes I see do.My wife responded, "I don't know, maybe a plane?". I then said, "I've never seen a plane light like that".The light then continued to grow in size and now was getting much closer our car. As we continued driving down the road, both watching the light, it then started to change color.The light now was getting very close to our car and was clearly hovering much lower than any plane would be flying. The bright white light had turned to a more dim version of its previous self.The entire time this was happening the light was clearly visible through our front windshield as we were driving down the highway.Now, after maybe 30 seconds, the more dim light was almost directly over our car. It was hovering, not moving like a plane or helicopter would be doing, and was only about 50-60 feet above our car. It was almost directly above our vehicle, being slightly on the passenger side of our car.I was sitting on the passenger side of the car and was completely in awe of what my wife and I were witnessing. I rolled my window down so that I could get a clear view of what was now above us. I could see through the dim orb of light a metal looking craft of some sort. I could see the craft was horizontal and got larger on both ends. Similar to a traditional dog bone shape. The metal looking craft also had lines running vertically up and down the sides. Once again the color started to change as we were passing the UFO.My wife and I had now just passed the UFO and I continued to watch it from out my rolled down window. The whole time, even with the window down, the UFO was silent, producing no noticeable noise. The light has now changed to a deep bright red color similar to a traffic light in color. The craft was no longer visible due to the brightness of the light.The red light stayed on and the craft hovered on over Kennewick, WA, as we continued towards Richland.As we were watching the orb of light, now behind us, the light would completely shut off and it would then turn back on. The light continued to blink on and off for the next 60 seconds or so until it was no longer in our line of sight.This was our first experience with any UFO. I have always been somewhat of a sceptic, but now know for certain that UFO's do exist. Having been so intrigued and wrapped up in the moment by what we were witnessing, neither my wife or I thought about using our smart phones to try and take a video. We hope that this post is helpful, and encourage anyone else driving on Highway 240 last night around 9:20 to also post what you have seen.