Front LEDs are red so I guess front sticker should be red. I have changed that. The other 2 colours were chosen to be easily identifiable from a distance. You can't confuse black or bright blue with red or with each other.
You can't make out the colors far enough away to make a difference anyway. The LEDs are invisible during the day unless you're close. The colors of stickers are nothing when the whole Phantom is nothing but a silhouette.