Wear red today! Science shows that wearing the colour red symbolizes (and radiates) authority, confidence, and sex appeal. Have a big meeting today? Wear red to take a powerful stance in the boardroom. Feeling down? Sport a red shirt or skirt to instantly boost your self-esteem and mood. Dressing to impress on a big date? Nothing stuns like a little red (or black) dress. Black is also a very classic and appropriate colour, as it is famous for making people look slimmer, sexier, and more sophisticated.