The app 'Shades' for OSX is free and can dim to warm colors, too. http://www.charcoaldesign.co.uk/shades http://www.charcoaldesign.co.uk/shades I use it to dim

The app 'Shades' for OSX is free and can dim to warm colors, too. http://www.charcoaldesign.co.uk/shades http://www.charcoaldesign.co.uk/shades I use it to dim the LED screen of my bedside MacMini to a very faint yellowish/brown color, which is just right for a totally dark room.