We've shared a few ways to get your monitor's colour calibrated, but if you're having trouble getting your dual monitors to match up, blogger Doc Rock recommends renting a colour meter from your local photo shop to get the job done.
While most folks don't need to calibrate their monitor's colour (unless you're a hardcore photo editor or graphic designer), dual-monitor setups can often cause a bit of colour frustration. While you can get a lot of great monitors for pretty cheap, they won't always come calibrated the same—heck, I bought two of the exact same monitor and their colours did not match at all. If you find that using your computer's built-in colour calibration tools just aren't working, you can get a little outside help for cheap:
I did a little research and found out my local Shutterbug shop rents out calibrators (actually colorimeters) for less than $US20. The software is very easy to use and you can have your monitors matched up and displaying perfect colour in minutes. I calibrated my Macbook Pro Unibody and every other machine I could find in the house. Make sure you save your calibrated settings in case you need to recall them later like after a hard drive change or Lion upgrade.
Check out the video above to see one of these calibrators in action, and if you've ever used one, share your experience with us in the comments.