I don't have any problem with the color scheme, however, if a person suffers from red/green color blindness the colors red or green will both appear to be "gray". This is one reason why horizontal traffic signals are no longer used at intersections. They must be vertical so the drivers can distinguish red from green. All others colors are seen as normal. Therefore they are looking at "gray" (instead of red) print on top of a gray background, which could be hard on the eyes. Whatever you decide is OK with me.