Man of Honour
The colours thing is standard for OLED from my experience, the pixels need a bit of warm up time which is to be expected as they're organic, much like how an audio amp is more efficient and in optimum order when it's been on for 20-30 minutes so the circuitry has less resistance flowing through it from the cold start. I think the eco mode correlation may be placebo though unless there is a weird sort of link and the screen keeps the pixels "hot" with eco off - It might explain why the fans are on all the time and the timer keeps on counting perhaps as a result?With eco on, I've noticed when the monitor comes back on from standby, colours are very over saturated to start with, after time, the colour returns to normal, didn't have this with eco off.