I just purchased a new Dell U3011. Once I got that I switched the mode to Custom Color and then the problem just started. The screen only showed blue colors .Further I made an online research and that has shown that this is an issue with the monitor. I tried switching to different modes and they came back to the Custom Color and it still showing only blue colors. I then turned the monitor off but that didnít resolve the issue. So if anyone suffering from same issue and know the solution then please get back to me.