The following color calibration charts are provided as a general reference. For most viewing purposes these will give a good enough indication of your monitor's calibration. However, it is recommended that you consult the manufacturer's documentation about your specific model.
Each B&W division indexed from 0 to 100 should be distinct on your monitor, though the break between 95 and 100 should be barely visible. If that is not the case, you should adjust contrast and brightness.
The RGB spectrum should fade smoothly from full color to black. If that is not the case, the color resolution (bit depth) of your monitor should be increased.