Are you certain your monitor profile is accurate? If so, then...
Perform a nozzle check to make certain all jets are open.
If all the jets are open then look at the cyan ink level and change that cartridge if the ink level is getting very low. (This worked for me this morning when my prints suddenly had a slight red discoloration. Your problem actually sounds more pronounced that I just experienced.)
I just did a nozzle check and used Colormunki to recalibrate my monitor
I am using an Espon r3000