Today
Black is only white today
All the colors fade away
Red is green is blue is gray
Right is wrong it's all okay
Always knew I wasn't fine
Never fit the grand design
Some things just don't make much sense
What's okay or gives offense
Man is wolf is man's best friend
Hunt that bastard til the end
Love is only hate today
None of us is quite okay
Joy's just pain you can't delay
Come is go is stay away
Been too long that I've been me
Dirty dog who's still not free
But today I've got a plan
Gonna bite that feeding hand
Dog is dead is gone ahead
Wolf is here and man has fled
I am only me today
Red is green it's all okay
White is black and blue is gray
Love is hate is here to stay
All the colors fade away
~Tonin, September 14, 2015
Several different layers going on here, and one of them is that it's not supposed to make sense. If you want a simple answer, call it a werewolf changing between human and wolf color perception.
Also, try this to set the rhythm: https://www.furaffinity.net/view/17658278/ Not a perfect match, but it gives the right feel.