Just changed out original factory (6 years old with 60,000 miles) DEXCOOL yesterday in my wife's car. It was a light pinkish orange color. The replacement Prestone DEXCOOL coolant was a deeper, more fluorescent orange color.
There were some rust flakes in the puke tank, so I was a little concerned what would drain out during the change. Other than being a slightly different color, it looked clean. No muck, sludge or rust particles.