Loupe Displays the Color Shown on Screen

The Loupe isn't displaying the color values that I set correctly. What's going on?

The Loupe tool displays the color that is actually being shown on screen, not the color that you set in your design. You'll have to take your monitor calibrations into account when selecting colors. For example, while you may know the color of an element in your design is #ffffff, that may not be what your screen is currently displaying. Since xScope reports what color is actually being shown on-screen, there may be a discrepancy between what you set as the color and what shows up in the Loupe.