Complementary colors lie opposite each other on the color wheel. They complete or enhance each other. Impressionist painters in the 19th century often placed dots of pure complementary pigment on a color's surface to make the color come alive.
Rack your beverage to the keg, apply COÂ², and purge as you would in the Let 'er Sit method. Now chill the keg to your serving temperature, 12 hours is enough time but overnight is better. After the keg has reached serving temperature make sure your regulator is set to the desired pressure.
It will keep for a few days if kept cold, but it progressively changes in taste with each day it's exposed to air. Tapping your keg with a party pump is like opening a 2-liter bottle of soda -- it puts air into the container. CO2 then escapes the liquid and dissipates into the air, making the beer flat.