Well I got the colors to change, except I get strange lines in parts of the gauge that aren't supposed to be there. I'm assuming that it's my background image getting messed up, so I'll mess with it some more, but at least I got it to work. I used the player window, too, because I made the target window bar about two times as large and didn't wanna mess with really big numbers and mess up
Great instructions, especially when one thinks about the way it works and can figure out the correct order of the colors.. and I also did Green, Orange, Yellow, and then Red, similar to the celtic percentage gauges, which I also added into my Kaori UI hehe. In conclusion, you can get it to work if you mess with it enough