Why is Africa associated with black colour?

For a long time, Africa has been associated with people who are black in complexion. We have some countries in Africa which their citizens are not black. Most of these are in northern part of Africa. Now if people think Africa means black, where will we classify these countries which their citizens are not black or chocolate in complexion?

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What is happening in America?

I grew up knowing that America is the last place where one could experience racism. The news am getting is making me feel as if I had been lying to myself. Can somebody come clean and prove my thoughts wrong.