Dear white fella; Couple of things you should know

When I was born , I black
When I grow up, I black
When I go in sun, I black
When I cold, I black
When I scared, I black
When I sick, I black
And when I die, I still black

You white fella
When you born, you pink
When you grow up, you white
When you go in sun, you red
When you cold, you blue
When you scared, you yellow
When you sick, you green
And when you die, you grey
And you have nerve to call me... Coloured??