What color tubes are not typically spun down?

In clinical laboratories, color-coded tubes are used to indicate the type of additive they contain. Generally, blue-top tubes, which contain sodium citrate for coagulation tests, are not typically spun down immediately because they need to maintain the blood's clotting properties for accurate testing. Additionally, gray-top tubes containing glycolytic inhibitors are often not spun down right away to avoid interfering with glucose measurements.