Also, remember that there are color blind people out there using the forum. So using clearly distinct colors for each rating type should really be considered rather than use so many colors that are closely similar.
Unfortunately, most people who are color blind cannot distinguish green from red. I'm not sure what such people actually see, though, since I'm not color blind. I can see colors (I'm not achromatopsiac) and can see a difference between them, but can't identify them by name.
E.g.
I can see these numbers are different colors, but they could be anything from yellow to brown to green to me.
I can see the black alright. Unless it's dark blue
+2 / =1 / -10
+2 / =1 / -10
+2 / =1 / -10