Who says that leaves are green

[MiniMax]

Who says that leaves are green
Or sky is blue?
Who says that days are always light
Or night is immanently dark?
 
Who says what anything is really like?

Who says I have to be like you?
Who says you have to be like me?
For your green may be my blue
My light may not be light for you
 
… and my colors change as seasons go.

I really like this poem! Maybe you could continue the pattern of the first part into the second part. Like saying "Who says I have to be like you? Or you have to be like me"  That way the last two lines not following that pattern have more impact.