Lab Tube Colors Cheat Sheet

Top Colors: Uses

Examples of Common Labs

Red:

Blood bank, type and cross, or used as a discard tube

Red Marble-top or Gold:

Chemistry, Ca, BUN, creatinine

Light Blue:

Coagulation studies, PT, PTT, INR, fibrinogen

Lavender:

Hematology, CBC, H&H platelet counts

Gray:

Chemistry, blood glucose

Green:

Chemistry ionized Ca