Other than color sync, try calibrating your display color by launching the display calibrator from system prefs > displays > color > calibrate...
The display calibrator does a much better job if you take the time to calibrate it in expert mode. This includes calibrating in ambient light settings corresponding to your normal working environment. If you've recently switched from PCs (or work on images intended for PC or TV display), you might be more used to the 2.2 TV gamma instead of the 1.8 that Macs usually use.