Open the examples gui and an example, for example CloudBalancing.
Notice that you can't copy the score.
That's because it's a JLabel instead of a JTextField.

if Score is not instanceof FeasibleScore: normal color (black)
else if FeasibleScore.isFeasible(): TangoColorFactory.CAMELEON_3
else: TangoColorFactory.SCARLET_3

test if it works properly, by opening all examples.