It depends on the lab. Red, speckled, yellow...
red tube
Red top
red top
speckle top
Red
lavendar
Green tube, lithium heparin.
the color tube is either gray or red..
serum,tiger tube
green
I would use the semi-colored tube.
The color tube u would use for the Creatinine test is GREEN...
a lavender top tube
blue
Lavender
red
red