“You should make lights shine the color that they are.” I wanted to, and when I saw 1.8 the first time, I thought that Notch had actually added colored light. Instead, he moved to a new system of multitexturing for light level code (basically using a second texture where the coordinates are torchlight and sunlight levels), which actually makes it much, much more difficult to ever make this happen. It would now take not just a complete rewrite, but also a redesign, of the lighting code.