Sounds like they're pushing CW food choices.
From here: US Army Tries to Curb Unhealthy Eating With Color Coded Food
So, bacon, butter, grilled pork chops, and pot roast are bad, but tuna and noodles and a lot of rabbit food are good.Red Food Example: Oven-fried bacon, sausage gravy, butter, sugary cereal and egg, sausage and cheese sandwiches. Salisbury steak, BBQ spareribs, grilled pork chops, Yankee pot roast and turkey gravy.
Green Food Example: Baked tuna and noodles, Brussels sprouts, spinach, turkey meatloaf, peas and carrots.
Leave it to the gub'ment. Eat what you know is good and screw the color coding. JMO of course.
More info on the system:
‘Health Matters’ in the Army, too | The Debrief Military Blog
Military mess halls: Fried, fatty, processed foods and sugary drinks are hurting our armed forces. - Slate Magazine
Soldiers feasting on healthier food | Article | The United States Army