I have no idea why, but the colours seem to be changing from the XIB/Storyboard to the device/simulation.
See below for a clear example of what's happening (the red has been added in Photoshop to hide the company name)
On the left is the xCode Storyboard, on the right is the simulator. As you can see, the shade of blue is dramatically changed!
Any idea as to why, and how I can fix this?