When I'm born I'm black, when I grow up I'm black, when I'm...

When I'm born I'm black, when I grow up I'm black, when I'm in the sun I'm black, when I'm sick I'm black, when I die I'm black, and you...when you're born you're pink, when you grow up you're white, when you're cold you're blue, when you're sick you're green, when you die you're grey and you dare call me coloured.