Gray top
Potassium oxalate
Sodium fluoride
Green top (non gel)
Heparin
Lavender top
EDTA
Light blue top
Sodium citrate
Pink top
EDTA
PPT pearl
EDTA thrixotropic gel
PST
Heparin thrixotropic gel
Red top
Clot activator( silica) or no additive
Royal blue top
No additive heparin EDTA
SST gold
Clot activator(silica) thrixotropic gel
Yellow top (blood bank)
ACD
Yellow top (microbiology)
Sterile SPS