Black and White

black is always black
it would never change 
white is always white
with little yellow it would be a beige
heart is always a heart 
differs in color , that ain't strange
there is a small part
prefers to remain black
all the time making no pity clack
there is a human chart 
of the people with white and pure heart
making no warck
yet, the other ones with stark
heart , makes it hard and dark
to any surrounding spark
yet, angel is always an angel
innocence and purity are his features
devil is always a devil 
no hope to change these creatures
black and white colors can be a grey
blindness and sight can never together be
they are two doors with different keys