On my dual monitor (Dell), the colour is off. How can I make them the correct colour? One is darker then the other, the settings are the same. I'm using ATI Radeon HD 5700 Series graphics card and both monitors are ATI Radeon HD 5700 Series.
After installing my monitors drivers, Photoshop complained that the monitors colour profile was incorrect.
I went Control Panel\All Control Panel Items\Display >> Change Display Settings >> Advanced Settings >> Colour Management Tab >> Colour Management... button to change the colour profile of my (single) monitor.
Might be worth investigating for your dual set up.