Unfortunately, I suspect part of the difficulty is caused by your monitor. Low end monitors, particularly those bundled with PCs, do not have the ability to display very many colors. You might be able to fiddle with your monitor's settings to make the grey more visible, but you might wind up losing certain shades of yellow (for example). That would be a short term solution for you.
Whoever controls this system could probably pick a better color, such as dark blue.