In reference to the song "Magenta" by Nano. If you haven't heard it, give it a listen.
It isn't clear what the meaning behind the title is... I don't know if I am right, but here is my guess:
Magenta doesn't actually exist on the light spectrum. Yet, we can see it.
When you feel like you can't find where you belong, and you are in a world that shows a front of fitting in (monochrome... implies you are a true part of the spectrum), just remember that you aren't alone, and within everyone is a unique individual that longs to emerge (tears of magenta) from behind the facade. If eyes are a window to the soul, tears of magenta is the true essence of everyone, leaking out from behind the farce the rest of the world sees.
So, close your eyes, and look inside. Find solace in being yourself, and that you can exist outside of the established construct of what you supposedly can be.
Even if you don't "fit in" anywhere, none of us do. We all exist outside of the established spectrum; deep down, you and I, we are all magenta.