Milk

[*Awful Llama*]

It can vary, according to this I found:

Whole Milk - Red Labels

• Whole milk labels are universally red, making them stand out from the reduced-fat and skim milks. Whole milk contains 8 grams of fat per cup, which equates to about 3.5 percent milk fat.
  
  

Reduced Fat Milk - Blue, Yellow, Green Labels

• Reduced-fat milk label colors vary by dairy manufacturer, with either a blue, yellow or green label. For example, Kemp's and Dairy Maid dairies both use yellow for their 2% milk, while Clover Organics and Borden use blue. A general guideline is blue or yellow for 2%, and green for 1% milk.
  
  

Skim Milk - Purple Labels

• Like whole milk, skim milk uses one color to distinguish it from the other types of milk. Most dairies use purple for skim milk labels. Unlike reduced-fat milk, skim milk is fat-free.
  
  

http://www.ehow.com/info_8476921_colors-milk-labels-mean.html