I'm not sure there is a way to change the color in the dialog, and even it was, it would require a lot of more coding. What you're suggesting would require the engine to keep a lot of numbers in the memory, something I always try to avoid due to the memory leak. I'm not inclined to change it since I'd never add something that might decrease stability. And if you ever get around to write the "How to train skills" FAQ it wouldn't be necessary
