I just had the weirdest thing happen, as I was trying to solve this same problem. I tried all kinds of different ways to output my PDF and kept getting a mismatch in the color. I tried all kinds of different color settings in all my programs (InDesign, Photoshop, and Acrobat) and kept getting a mismatch. Finally I tried looking at Acrobat's Preferences. Under Page Display, I tried changing the transparency color blending space from RGB to CMYK, no change. I then tried changing the Overprint Preview to Always, no change. Then I tried, on a lark, changing the Smooth Text from For Laptop/LCD Screens to None. BINGO! Now, here's the weirdest thing: when I tried to change it back, the color did not go back to being wrong. It seems it's not a setting problem, it's a bug. Somehow I triggered it to display my colors correctly.