If orange yells for attention and warmth then red screams for it. Red is all about attention. The color red provides energy to the room that is unmatched. Red is a great color to use as an accent because it brings it a focal attention to that specific piece.
The brighter red the higher the amount of energy is given off. In the picture below, you can feel more energy from the brighter red carpet than the less intense red from the red chair in the foreground.