I've connected my Dell U2515H monitor to my 2013 Macbook Pro via the MiniDP to DP cable. The display is working however, it appears that is having an issue with colors. Take a look at the attached screenshots and see... In the first, the finder is totally washed out with white. The second shows how the shadow around the topmost window seems to fix the problem. Can anyone help me address this? Thanks! EDIT: New screenshots taken with phone as screenshot utility in OS X renders it properly.