Fade To Gray.

Here's a grayscale that might assist in adjusting your monitor - with its contrast set to highest (or 100%) adjust the brightness so that you see (ideally) all shades of grey in the above picture (click on it to see a larger version). All sections have the same width, and the area at the bottom is exactly the color of BPU's background. If your monitor is old, you may find it difficult (or impossible even) to display all nuances. Note - the white line marks the two shades of gray BPU's b/g color sits between.