First, you're better off using a PNG or Photoshop (PSD) file for anything requiring transparency, rather than a TIFF file. Also, don't forget to change the color mode of the image to CMYK before you save it and bring it into InDesign; most people (myself included) tend to forget that. Second, there's an inherent problem with your statement; you've indicated that you're using CMYK values, but you're exporting to an RGB document (assuming you're using a PDF copy for electronic use). Unless you're going to print it out using a CMYK printer, it needs to be color matched to the proper output format, i.e., RGB for electronic screens, CMYK for printed copies. You also need to make sure your Adobe PDF Presets are set to output the right color format of the intended document (RGB or CMYK). The default color output for Acrobat is RGB; for CMYK, you need to change it in the Output setting in the Presets. For the primary publication I work on, I actually have to run my CMYK version first for print, then convert all the pictures/graphics to RGB for the PDF version prior to putting it on my client's website for member viewing. Make sure whenever you're working on logos that you're on the same color profile in both Photoshop and InDesign. In Photoshop, change the Image Mode of course, but also select View>Proof Setup, then choose the color profile you want (one of the Standard CMYK (SWOP2) or RGB profiles, then select Proof Colors so you can see the color accurately represented on your screen. In InDesign, do the same thing, but also go to View>Preview so you can see how the colors will look. Before you print, select Overprint Preview, then go to View>Screen Mode>Presentation to get a better look at how it will actually print out. If you've got an HD Monitor, select View> Display Performance>High Quality Display to improve your color presentation also. You're also better printing directly to PDF than exporting if you have Acrobat Pro if you're going to put a PDF online. While you can adjust presets for both print or export, printed copies are generally smaller than exported ones. Of course if you're exporting to PDF Interactive, that's a different matter. Bottom line - make sure that your Photoshop color profile for your image, InDesign color profile for the document, and Acrobat output color mode match for the intended output document color mode, or red will look like pink, yellow will look like orange, and green will look like puke.