In the episode 'A new Digitude', near the end, when they break the dark rings off the Tyrannomon, the Tyrannomon blink and open their eyes. Their eyes are clearly BLUE. Then Kari takes a picture of them. Later, in the computer room, Kari starts to complain that the camera caught them with red eyes, then says something along the lines of 'Oh yeah, I forgot, they always have red eyes', or something like that. But their eyes are blue!