In Death Note, people's eye and hair colour change when they are shown talking to themselves or thinking. Light changes to red colour, L to blue shade, Matsuda to yellow and Misa with lighter blue then L and Yotsuba Group member with purple. So what is the symbolism behind this colour pattern and what does it signify? I thought Red is for evil, blue for good but Misa also have blue colour.....so my theory fails here and what does yellow signify? Curiosity or what?