| Cap color | Clinical application | Volume | Specimen | Additive |
| Red | Serum biochemistry | 2/3/4/5ml | Serum | None (A silicone coating on the interior walls reduces adherence of the red cells to tube walls) |
| Yellow | Quick serum biochemistry test | 2/3/4/5ml | Serum | Separation Gel and Clot Activator (A silicone coating on the interior walls reduces adherence of the red cells to tube walls) |
| Orange | Quick serum biochemistry test | 2/3/4/5ml | Serum | Clot Activator : fibrin ferment (A silicone coating on the interior walls reduces adherence of the red cells to tube walls) |
| Blue | Blood coagulation test | 2/3/4/5ml | Plasma | Anticoagulant : Blood should be 9 times than sodium citrate |
| Grey | Blood glucose test | 2/3/4/5ml | Plasma | Anticoagulant : EDTA, Sodium Fluoride |
| Green | Blood rheologytest | 2/3/4/5ml | Plasma | Anticoagulant : Lithium heparin or Sodium heparin |
| Aqua | Quick plasma biochemistry test | 2/3/4/5ml | Plasma | Separation gel, Lithium heparin |
| White | Nucleic acid detection test | 2/3/4/5ml | Plasma | Separation gel, EDTA |
| Purple | Whole blood test | 1.8/2.7/3.6ml | Whole Blood | Anticoagulant : EDTA-2K or EDTA-3K |
| Black | ESR | 2/3/4/5ml | Whole Blood | Anticoagulant : Blood should be 4 times than sodium citrate |