What are the colors of nonadditive tubes?

Nonadditive tubes, often used in laboratory settings for blood collection, typically come in a variety of colors that indicate the type of additive contained within. Common colors include lavender or purple for EDTA, light blue for sodium citrate, and green for heparin. Each color signifies a different purpose, such as anticoagulation or preservation of blood components for specific tests. It's essential to use the correct tube color to ensure accurate test results.