C++ :: Use Enums Defined In Class Outside That Class?

I had defined enums in a class like this:

Code:
class Enums {
public:
enum COLOURS {BLACK, GRAY, RED, ORANGE, YELLOW,
GREEN, BLUE, PURPLE, BROWN, PINK, WHITE};
}

But I don't want to use the enums inside of that class. I want to use it in the main file like this:

Code:
#include <iostream>
using namespace std;
void SetColor(const int COLOR) {
cout << COLOR << endl;
}
int main(int argc, char* argv[]) {
void SetColor(BLACK);
return 0;
}

Without getting a syntax error.